development of the human embryo

anatomy animal animalia biology blastocyst blastomeres blastula cell cellular development developmental diagram differentiation diploid division early egg embryo embryogenesis embryology embryonic female fertile fertility fertilization fetal fetus formation gamete genetic gynecology haploid head health human implantation infertility isolated lateral mammal mammalian medical medicine meiosis microscopic morula oocyte ovary ovulation ovum pregnancy reproduction reproductive sapien science sexual sperm stage stem uterus vector woman zygote