Sexual intercourse. What happens to a developing child first? Development of hands
The heart begins beating.
First it's a Zygote, a fertilized egg, and then a blastocyst. Medically it's not a child until it's born. But if we start with embryo you can read all about it in the link below.
The attachment of the embryo to the placenta by the umbilical cord and the placenta's contact with the uterus occurs during the first trimester of pregnancy. This is when the embryo develops into a more complex structure, and the placenta begins to form and function, facilitating nutrient and waste exchange between the mother and the developing fetus.
It might separate from the wall of the uterus causing a miscarriage.
The major organs systems have started developing.
The major organs systems have started developing.
Yes, the placenta is responsible for transferring nutrients and oxygen from the mother's bloodstream to the developing fetus. It acts as a barrier that allows for this exchange to occur while also filtering out waste products from the fetus back into the mother's circulation.
This condition is called Placenta Previa. With placenta previa, the placenta grows on the lower part of the uterus partially or totally covering the opening of the cervix. The placenta should form at the top of the uterus, above the baby. With a normal pregnancy, the baby would be born first, then the placenta. With placenta previa, the placenta would be delivered first. Women with placenta previa require a c-section because as soon as the umbilical cord comes into contact with oxygen, the baby will automatically breathe with his lungs. Delivering the placenta first puts the baby at risk of suffocation in the womb.
cleavage->gastrulation->implantation->formation of placenta->first labor
The yolk sac develops first during early embryonic development, providing essential nutrients to the embryo before the placenta is fully formed. The yolk sac is present in the early stages of pregnancy and plays a crucial role in early blood cell formation and nutrient transfer. As the pregnancy progresses, the placenta takes over these functions, becoming the primary organ for nutrient and gas exchange between the mother and the developing fetus.
The terrible twos is a term used to commonly describe the point in a child;s life where he or she begins developing their own independence. This is when they start to challenge authority and first start misbehaving, thus leading to temper tantrums and crying fits, which commonly happens around the age of two.