| A | B |
|---|
| AIDS (stands for...) | acquired immune deficiency syndrome |
| AIDS (def.) | viral infection that destroys the functin of the human immune system |
| amniocentesis | technique in which some of the amniotic fluid surrounding an embryo is removed for analysis |
| amnion | one of four embryonic membranes of vertebrate embryos; protects the embryo in watery fluid |
| amniotic fluid | fluid that fills the amnion and cushions and protects the embryo |
| amniotic sac | sac which surrounds and hold amniotic fluid |
| caesaren section | delivery of an infant through an incision in the abdominal and uterine walls |
| chorionic villi sampling | study of extra-embryonic cells making it possible to determine the genetic errors in the embryo |
| congenital | existing at or dating from birth |
| contraction | shortening & thickening of a functioning muscle as in the uterus in preparation for delivery of infant |
| Down's syndrome | congential condition caused by a chromosome abnormality that leads to mental retardation |
| embryonic period | the first 2 months of pregnancy in humans |
| fetal period | the time period for a fetus |
| fetus | developing human form week 8 until birth |
| HCG (stands for ...) | human chorionic gonadotrophin |
| HCG (def.) | hormone secreted by cells surrounding the embryo during implantation |
| morning sickness | nausea experienced by pregnant women caused by elevated levels of progesterone and estrogen |
| oxytocin | hormone secreted by the pituitary gland to signal the uterus to begin contractions prior to birth |
| placenta | mass of small blood vessels & associated tissues across which materials are exchanged between embryo & mother |
| unbilical cord | structure that contains blood vessels; transports blood between embryo & placenta |
