![]() ![]() This marks the beginning of a pregnancy that has every chance of continuing. Taking a “morning after” pill before this time will prevent implantation and, thus, the pregnancy. The beginning of blood circulation within the placenta begins. That may explain why some believe this is the beginning of the pregnancy. It is thought that more than half the eggs that get fertilized never complete the process of implantation. It is likely the mother does not have any idea she has begun the first stage of pregnancy.īaby (blastocyst): By this time, the blastocyst has successfully attached to the endometrium. It is at this time that it begins the process of attaching itself to the inside lining of the uterus (endometrium or womb). Many women experience no symptoms during this stage of pregnancy especially considering the fact a pregnancy might not ever take place.īaby (blastocyst): The cells inside the blastocyst (embryoblast) will develop into the fetus while the cells outside (trophoblast) will become the placenta. The mother may still not have any idea she is pregnant. Along the way, it repeatedly divides every 12-20 hours (mitosis).Ĭhances are, the mother is not experiencing any signs of pregnancy although some women do have morning sickness very early in their pregnancies.īaby (zygote): By the time the zygote is comprised of 16 cells (16 cell morula or pre-embryo), it should reach the opening of the uterus. The fertilized egg continues down the fallopian tube where it is supposed to implant in the lining of the uterus if it is to live. When they unite (conception), they create a single cell with 46 chromosomes (diploid). What follows is a detailed description of the development of what may, eventually, become a unique human being.īaby (zygote): The egg and sperm each contain 36 chromosomes (haploid cells). If the magic takes place, the fertilized egg, or zygote, begins its trip to the uterus that is waiting to receive it and offer it a chance at life. If this does not occur, the egg will continue to travel until it is expelled from the woman’s body along with the unused lining of the uterus. If a woman’s egg, the ovum, encounters a viable spermatozoon or motile sperm, they will unite, and a new life will begin. On a path fraught with peril, it all depends on timing. It begins as a single cell on a journey – a journey that will end with death or life. ![]()
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