The phases of growth of the Fetus
, MD, Saint Louis University Class of Medicine
Once per month, an egg is released from an ovary in to a fallopian pipe. After sexual activity, sperm move through the vagina through the cervix and womb into the fallopian pipes, where one semen fertilizes the egg. The fertilized egg (zygote) divides over and over over and over over repeatedly since it moves along the tube that is fallopian the womb. First, the zygote turns into a good ball of cells. Then it turns into a ball that is hollow of called a blastocyst.
The blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes inside the uterus.
At 2 months of maternity, the placenta and fetus have now been developing for 6 months. The placenta kinds tiny hairlike projections (villi) that stretch to the wall surface associated with the womb. Bloodstream through the embryo, which move across the cord that is umbilical the placenta, develop within the villi.
A slim membrane separates the embryo’s bloodstream into the villi through the mom’s blood that flows through the room surrounding the villi (intervillous room). The following is done by this arrangement:
Allows materials to be exchanged involving the bloodstream for the mom and therefore associated with embryo
Stops the caretaker’s disease fighting capability from attacking the embryo since the mom’s antibodies are way too big to feed the membrane layer (antibodies are proteins created by the system that is immune assist protect your body against international substances)
The embryo floats in fluid (amniotic fluid), that is found in a sac (amniotic sac).
The fluid that is amniotic the immediate following:
