Explanation:
In females, egg; in males, sperm. Fertilization, The process in sexual reproduction in which a female gamete and male ... Fetal stage: Once the formed features of the embryo begin to grow and develop, ...
Fetus: Differences Between Stages Week by Week ... A zygote is a single-celled organism resulting from a fertilized egg. ... This ball of cells, known as a blastocyst, develops into the embryo and ...
