
After 12 weeks or so, the baby's development is largely "finished" - except brain and lung development"
"A great website: Teratogens: Protecting your Unborn Baby
- The early processes of development all need to occur at a precise time and place - that is why poor maternal nutrition, fever, drugs, alcohol, (particularly in the 1st trimester) all have potentially serious effects of the developing baby."
Prenatal Development and Its Influence on Children's Development
Fetus to Newborn: The Perinatal Period
Both nicotine and carbon monoxide can reduce the size of the baby of a smoking mother. The immature liver of the fetus is unable to clear these drugs very fast and the effects may be profoundly damaging in the developing baby.
The baby stores reserves of glycogen in its liver and muscles preparatory to birth. After it is born it rests and lives on these reserves (and an occasional bottle of sugar water) until the mother�s colostrum and then the milk come in a few days later.
http://www.yale.edu/ynhti/curriculum/units/1982/7/82.07.08.x.html
Before the Beginning
"A formidable force is changing the way prenatal diseases and birth defects are viewed by pioneering ways to help babies before they are born."
Ultrasonography
This is a non-invasive procedure that is harmless to both the fetus and the mother. High frequency sound waves are utilized to produce visible images from the pattern of the echos made by different tissues and organs, including the baby in the amniotic cavity.http://library.med.utah.edu/WebPath/TUTORIAL/PRENATAL/PRENATAL.html
Sometimes, however, parvovirus B19 infection will cause the unborn baby to have severe anemia and the woman will have a miscarriage.
Other physicians may increase the frequency of doctor visits and perform blood tests and ultra-sound examinations to monitor the health of the unborn baby."
http://embryology.med.unsw.edu.au/Defect/parvovirus.htm
