Welcome to Gaia! ::

Reply Library of Logic
Fetal Development by week and trimester

Quick Reply

Enter both words below, separated by a space:

Can't read the text? Click here

Submit

Yi Min

PostPosted: Fri Jun 02, 2006 9:26 pm


Because we now have the Library of Logic and most of the information I was going to but into this is now in seperate posts, I've decided to leave this at Fetal Development. I'll be adding medically correct photos/sketches soon.

Thanks!!
Yi Min

Index

arrow First Trimester
arrow Second Trimester
arrow Third Trimester
arrow Medical Definitions
arrow Some Links


Note:
* Please feel free to let me know if any information I've found it wrong/outdated or contradicts popular knowlege.*

Taken from MedlinePlus Medical Encyclopedia
and WebMD

Information from Web MD will have a * beside it.
PostPosted: Thu Jun 15, 2006 12:48 am


arrow *First Trimester*

*It's confusing, but doctors typically measure the start of pregnancy as the first day of your last menstrual period. This is called the 'menstrual age' and is about two weeks ahead of when conception actually occurs, so throughout the timeline, fetal development lags 2 weeks behind your week of pregnancy.

When sperm is deposited in the v****a, it travels through the cervix and into the Fallopian tubes. Conception usually takes place in the Fallopian tube. A single sperm penetrates the mother's egg cell, and the resulting cell is called a zygote.

The zygote contains all of the genetic information (DNA) necessary to become a child. Half of the genetic information comes from the mother?s egg, and half from the father?s sperm.

The zygote spends the next few days traveling down the Fallopian tube and divides to form a ball of cells. Further cell division creates an inner group of cells with an outer shell. This stage is called a "blastocyst". The inner group of cells will become the embryo, while the outer group of cells will become the membranes that nourish and protect it.

The blastocyst reaches the uterus at roughly the fifth day, and implants into the uterine wall on about day six. At this point in the mother's menstrual cycle, the endometrium (lining of the uterus) has grown and is ready to support a fetus. The blastocyst adheres tightly to the endometrium, where it receives nourishment via the mother's bloodstream.

The cells of the embryo now multiply and begin to take on specific functions. This process is called differentiation, which produces the varied cell types that make up a human being (such as blood cells, kidney cells, and nerve cells).

Week 3
beginning development of the brain, spinal cord, and heart
beginning development of the gastrointestinal tract

Weeks 4 to 5
formation of tissue that develops into the vertebra and some other bones
further development of the heart which now beats at a regular rhythm
movement of rudimentary blood through the main vessels
beginning of the structures of the eye and ears
the brain develops into five areas and some cranial nerves are visible
arm and leg buds are visible

Week 6
*The embryo looks like a tadpole.It's the size of a BB pellet from crown to rump (crown-to-rump length is used because the baby's legs are usually not well developed yet and are bent and hard to measure).

beginning of formation of the lungs
further development of the brain
arms and legs have lengthened with foot and hand areas distinguishable
hands and feet have digits, but may still be webbed

*Ultrasound usually detects a heartbeat by now. Between 17 and 56 days the embryo is most susceptible to drugs, disease, and other factors that interfere with normal growth

Week 7
nipples and hair follicles form
elbows and toes visible
all essential organs have at least begun to form

Week 8
rotation of intestines
facial features continue to develop
the eyelids are more developed
the external features of the ear begin to take their final shape

The end of the eighth week marks the end of the "embryonic period" and the beginning of the "fetal period".

Weeks 9 to 12
*The fetus measures about 1.5 to 3 inches from crown to rump and weighs approximately one and one-half ounces.

the fetus reaches a length of 3.2 inches
the head comprises nearly half of the fetus' size
the face is well formed
eyelids close and will not reopen until about the 28th week
tooth buds appear for the baby teeth
limbs are long and thin
the fetus can make a fist with its fingers
genitals appear well differentiated
red blood cells are produced in the liver

*Its organs are all present, and will continue to develop through the second and third trimesters. Since the most critical development has taken place, your chance of miscarriage drops considerably after this week.

Yi Min


Yi Min

PostPosted: Thu Jun 15, 2006 12:51 am


arrow *Second Trimester*

Weeks 13 to 16
the fetus reaches a length of about 6 inches
a fine hair develops on the head called lanugo
fetal skin is almost transparent
more muscle tissue and bones have developed, and the bones become harder
the fetus makes active movements
sucking motions are made with the mouth
meconium is made in the intestinal tract
the liver and pancreas produce their appropriate fluid secretions

Week 20
the fetus reaches a length of 8 inches
lanugo hair covers entire body
eyebrows and lashes appear
nails appear on fingers and toes
the fetus is more active with increased muscle development
"quickening" usually occurs (the mother can feel the fetus moving)
fetal heartbeat can be heard with a stethoscope

Week 24
the fetus reaches a length of 11.2 inches
the fetus weighs about 1 lb. 10 oz.
eyebrows and eyelashes are well formed
all the eye components are developed
the fetus has a hand and startle reflex
footprints and fingerprints forming
alveoli (air sacs) forming in lungs

*Some babies can survive if delivered after the 23rd week.
PostPosted: Thu Jun 15, 2006 12:53 am


arrow * Third Trimester*
- Starts after week 27

Weeks 25 to 28
the fetus reaches a length of 15 inches
the fetus weighs about 2 lbs. 11 oz.
rapid brain development
nervous system developed enough to control some body functions
eyelids open and close
respiratory system, while immature, has developed to the point where gas exchange is possible
a baby born at this time may survive, but the possibilities for complications and death remain high

Weeks 29 to 32
the fetus reaches a length of about 15-17 inches
the fetus weighs about 4 lbs. 6 oz.
rapid increase in the amount of body fat
rhythmic breathing movements occur, but lungs are not fully mature
bones are fully developed, but still soft and pliable
fetus begins storing iron, calcium, and phosphorus

*Baby will gain up to half its birth weight between now and delivery


Week 36
the fetus reaches a length of about 16-19 inches
the fetus weighs about 5 lbs. 12 oz. to 6 lbs. 12 oz.
lanugo begins to disappear
increase in body fat
fingernails reach the end of the fingertips
a baby born at 36 weeks has a high chance of survival, but may require some medical interventions

Weeks 37 to 40
considered full-term at 37 weeks
may be 19 to 21 inches in length
lanugo is gone except for on the upper arms and shoulders
fingernails extend beyond fingertips
small breast buds are present on both sexes
head hair is now coarse and thicker

Yi Min


Yi Min

PostPosted: Thu Jun 15, 2006 12:54 am


arrow Medical Terms
Definitions from MedlineP.-Medical Dictionary.
Let me know if you'd like to see anything else here.


Quote:
Main Entry: preg?nant
Pronunciation: preg-nnt
Function: adjective


Quote:
Main Entry: em?bryo
Pronunciation: em-br-
Function: noun
Inflected Form(s): plural em?bry?os
1 archaic : a vertebrate at any stage of development prior to birth or hatching
2 : an animal in the early stages of growth and differentiation that are characterized by cleavage, the laying down of fundamental tissues, and the formation of primitive organs and organ systems; especially : the developing human individual from the time of implantation to the end of the eighth week after conception


Quote:
Main Entry: fe?tus
Variant(s): or chiefly British foe?tus /ft-s/
Function: noun
Inflected Form(s): plural fe?tus?es or chiefly British foe?tus?es or foe?ti /ft-/
: an unborn or unhatched vertebrate especially after attaining the basic structural plan of its kind; specifically : a developing human from usually two months after conception to birth


Quote:
Main Entry: ne?o?nate
Pronunciation: n--nt
Function: noun
: a newborn infant; especially : an infant less than a month old


Quote:
Main Entry: abor?tion
Pronunciation: -br-shn
Function: noun
1 : the termination of a pregnancy after, accompanied by, resulting in, or closely followed by the death of the embryo or fetus: a : spontaneous expulsion of a human fetus during the first 12 weeks of gestation -- compare MISCARRIAGE b : induced expulsion of a human fetus c : expulsion of a fetus of a domestic animal often due to infection at any time before completion of pregnancy -- see CONTAGIOUS ABORTION, TRICHOMONIASIS b, VIBRIONIC ABORTION
2 : arrest of development of an organ so that it remains imperfect or is absorbed
3 : the arrest of a disease in its earliest stage




Legal Terms

Other Terms
PostPosted: Thu Jun 15, 2006 12:58 am



Yi Min


Akhakhu

PostPosted: Thu Jun 15, 2006 1:04 am


For the effects of pregnancy:
Moniquill and Nethilia
Take solace in the fact that every pregnancy holds the risk of death.

These are the normal, frequent or expectable temporary side effects of pregnancy:

-- exhaustion (weariness common from first weeks)
-- altered appetite and senses of taste and smell
-- nausea and vomiting (50% of women, first trimester)
-- heartburn and indigestion
-- constipation
-- weight gain
-- dizziness and light-headedness
-- bloating, swelling, fluid retention
-- hemorrhoids
-- abdominal cramps
-- yeast infections
-- congested, bloody nose
-- acne and mild skin disorders
-- skin discoloration (chloasma, face and abdomen)
-- mild to severe backache and strain
-- increased headaches
-- difficulty sleeping, and discomfort while sleeping
-- increased urination and incontinence
-- bleeding gums
-- pica
-- breast pain and discharge
-- swelling of joints, leg cramps, joint pain
-- difficulty sitting, standing in later pregnancy
-- inability to take regular medications
-- shortness of breath
-- higher blood pressure
-- hair loss
-- tendency to anemia
-- curtailment of ability to participate in some sports and activities
-- infection including from serious and potentially fatal disease (pregnant women are immune suppressed compared with non-pregnant women, and are more susceptible to fungal and certain other diseases)
-- extreme pain on delivery
-- hormonal mood changes, including normal post-partum depression
-- continued post-partum exhaustion and recovery period (exacerbated if a c-section -- major surgery -- is required, sometimes taking up to a full year to fully recover)

These are the normal, expectable, or frequent PERMANENT side effects of pregnancy:

-- stretch marks (worse in younger women)
-- loose skin
-- permanent weight gain or redistribution
-- abdominal and vaginal muscle weakness
-- pelvic floor disorder (occurring in as many as 35% of middle-aged former child-bearers and 50% of elderly former child-bearers, associated with urinary and rectal incontinence, discomfort and reduced quality of life)
-- changes to breasts
-- varicose veins
-- scarring from episiotomy or c-section
-- other permanent aesthetic changes to the body (all of these are downplayed by women, because the culture values youth and beauty)
-- increased proclivity for hemorrhoids
-- loss of dental and bone calcium (cavities and osteoporosis)

These are the occasional complications and side effects:

-- hyperemesis gravidarum
-- temporary and permanent injury to back
-- severe scarring requiring later surgery (especially after additional pregnancies)
-- dropped (prolapsed) uterus (especially after additional pregnancies, and other pelvic floor weaknesses -- 11% of women, including cystocele, rectocele, and enterocele)
-- pre-eclampsia (edema and hypertension, the most common complication of pregnancy, associated with eclampsia, and affecting 7 - 10% of pregnancies)
-- eclampsia (convulsions, coma during pregnancy or labor, high risk of death)
-- gestational diabetes
-- placenta previa
-- anemia (which can be life-threatening)
-- thrombocytopenic purpura
-- severe cramping
-- embolism (blood clots)
-- medical disability requiring full bed rest (frequently ordered during part of many pregnancies varying from days to months for health of either mother or baby)
-- diastasis recti, also torn abdominal muscles
-- mitral valve stenosis (most common cardiac complication)
-- serious infection and disease (e.g. increased risk of tuberculosis)
-- hormonal imbalance
-- ectopic pregnancy (risk of death)
-- broken bones (ribcage, "tail bone")
-- hemorrhage and
-- numerous other complications of delivery
-- refractory gastroesophageal reflux disease
-- aggravation of pre-pregnancy diseases and conditions (e.g. epilepsy is present in .5% of pregnant women, and the pregnancy alters drug metabolism and treatment prospects all the while it increases the number and frequency of seizures)
-- severe post-partum depression and psychosis
-- research now indicates a possible link between ovarian cancer and female fertility treatments, including "egg harvesting" from infertile women and donors
-- research also now indicates correlations between lower breast cancer survival rates and proximity in time to onset of cancer of last pregnancy
-- research also indicates a correlation between having six or more pregnancies and a risk of coronary and cardiovascular disease

These are some less common (but serious) complications:

-- peripartum cardiomyopathy
-- cardiopulmonary arrest
-- magnesium toxicity
-- severe hypoxemia/acidosis
-- massive embolism
-- increased intracranial pressure, brainstem infarction
-- molar pregnancy, gestational trophoblastic disease (like a pregnancy-induced cancer)
-- malignant arrhythmia
-- circulatory collapse
-- placental abruption
-- obstetric fistula

And a few more permanent side effects:

-- future infertility
-- permanent disability
-- death.
PostPosted: Thu Jun 15, 2006 1:07 am


Thank You heart

Yi Min


Half Baked SF

PostPosted: Thu Jun 15, 2006 5:24 am


I have a page on the dangers of DIY abortions (abortifacients, wire hangers, etc.) Would that help?
PostPosted: Thu Jun 15, 2006 6:11 am


Toga! Toga!
I have a page on the dangers of DIY abortions (abortifacients, wire hangers, etc.) Would that help?


Sure can! I could definetly fit that in! heart

Yi Min


Half Baked SF

PostPosted: Thu Jun 15, 2006 7:22 am


[ Message temporarily off-line ]
PostPosted: Sat Aug 05, 2006 4:12 am


Updated for fetal development only, because there are threads that already have the information I was going to include.

Yi Min


Deformography

Liberal Genius

2,950 Points
  • Citizen 200
  • Signature Look 250
  • Wall Street 200
PostPosted: Tue Sep 12, 2006 1:28 pm


I'm wondering... at which point is the fetus' nervous system developed enough for it to feel pain?
PostPosted: Tue Sep 12, 2006 2:24 pm


I'd just like to add a few things:

-You left off the definition for pregnancy in your post.

-You listed prochoice.com as a pro-choice site, but a quick look there proves it is not.

Quote:
The statement we keep hearing is: We need to "Keep abortion safe and legal". What is referred to in the terms: "Safe and legal"?
Abortion is an interesting procedure, it is the only 'medical procedure' that gives special protection to those who perform it. Making those who profit from abortion safer and legally protected. This should create an immediate red flag! As an industry, it operates with very little regulation or scrutiny and is continually lobbying for less.

If you like to be operated on in 3rd world countries
but pay a civilized world price this is for you.

In other words, it is a rip off with little concern for the patient, it's a business!



Quote:
SALT POISONING (SALINE INJECTION):"Salting out" is the second most common method of inducing abortion and is usually used after sixteen weeks. The doctor inserts a long needle through the mother's abdomen and injects a saline solution into the sac of amniotic fluid surrounding the baby. The baby is poisoned by swallowing the salt and his skin is completely burned away. It takes about an hour to kill the baby. After the child dies, the mother goes into labor and expels the dead baby. Saline injections have been outlawed in some countries because of the risks to the mother, which can include lung and kidney damage if the salt finds its way into her bloodstream. In spite of the horrible burning effect, some babies have survived "salting out" and been born alive.
Someone please correct me, but isn't it true that saline injection abortion is no longer practiced?

That whole page is meant to scare women out of abortions than to actually give them information. Not to mention the site is terribly disorganized and not very reliable.

Half Baked SF

Reply
Library of Logic

 
Manage Your Items
Other Stuff
Get GCash
Offers
Get Items
More Items
Where Everyone Hangs Out
Other Community Areas
Virtual Spaces
Fun Stuff
Gaia's Games
Mini-Games
Play with GCash
Play with Platinum