1. Where does the process fertilization take place? 2. When is the most possible time for fertilization if the menstrual cycle is 28 days? Explain your answer.
3. The placenta is completely developed by the end of the third month. Which organ supplies the embryo with oxygen and nutrients before the formation of the placenta?

Explanation:

Answer 1) fertilization takes place in the fallopian tubes, which connect the ovaries to the uterus

Answer 2) sorry i dont know

Answer 3)The unborn baby is connected to the placenta by the umbilical cord. All the necessary nutrition, oxygen, and life support from the mother's blood goes through the placenta and to the baby through blood vessels in the umbilical cord