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No Abortion in South Dakota!
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[QUOTE]Originally posted by The Ginger Beacon: [QB] OK,here's the science bit... First you get your haploid (1 set of chomosomes) gamates (a sperm and egg). Man meets woman, squishy jiggling ensues, it gets a bit messy... The sperm does its thang, fuses with an egg and fertilizes it. The fertilized ovum (now refered to as a zygote)is diploid (2 sets of chromosomes = 46) and undergoes mitosis a few times. It them becomes a morula (a ball of cells essentialy) after about 3 days. Next it develops into a hollow ball of cells (a blastocyst). The blastocyst then embeds itself into the wall of the uterus, (about 10 days after fertilization). A group of cells inside the blastocyst forms the yolk sack and the amniotic cavity (from which the embryo develops). The cells on the outside of the blastocyst (called trophoblasts) form the chorion (which forms the placenta.) An embryo now develops, and carries on for about eight weeks, after which time is considered a foetus. At the end of the 1st trimester (which is the cut off point for abbortions that are for no medical reason in many countries) a foetus is around 2" from crown to backside. It has clearly defined arms, legs etc. and continues to develop for a further 21 weeks until birth. So, to answer your question, I'd say sometime between 5 and 8 weeks (but I am not an expert, just a biology student with too much time on his hands). James [/QB][/QUOTE]
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