Day 1The early human zygote where the male and female pronuclei have not yet combined to form the single zygote nucleus. These pronuclei are the nuclei from the spermatozoa (sperm) and oocyte (egg) and contain all the nuclear genetic material (chromosomes, DNA, genes).
The pronuclei from both genders have not combined yet to form a single zygote nucleus. These pronuclei hold all genetic information such as DNA, chromosomes, and genes.
Day 8A fertilized egg implants itself on the uterine wall 8 days after ovulation.