Sagot :
Answer:
This is when a thick lining of uterus vesses slowly develops.
If the egg is fertilized by a sperm as it travels down the fallopian tube, then pregnancy occurs. The fertilized egg attaches to the lining of the uterus. The placenta then develops. The placenta transfers nutrition and oxygen to the fetus from mother.
Explanation:
Sana makatulong Hindi KO po Alam Yong pangalawa