human fertilization is what we call the moment when the sperm and ovum join.
human fertilization is what we call the moment when the sperm and ovum join.
what do we call the moment when the sperm and ovum join?
human fertilization
section::::fusion.









































after the sperm enters the cytoplasm of the oocyte (also called ovocyte), the tail and the outer coating of the sperm disintegrate and the cortical reaction takes place, preventing other sperm from fertilizing the same egg. the oocyte now undergoes its second meiotic division producing the haploid ovum and releasing a polar body. the sperm nucleus then fuses with the ovum, enabling fusion of their genetic material.









































section::::fusion.:cell membranes.









































the fusion of cell membranes of the secondary oocyte and sperm takes place.









































section::::fusion.:transformations.
human fertilization
during ovulation, the ovum travels down the fallopian tubes to the uterus. these extend about from both sides of the uterus. finger-like projections at the ends of the tubes brush the ovaries and receive the ovum once it is released. the ovum then travels for three to four days to the uterus. after sexual intercourse, sperm swim up this funnel from the uterus. the lining of the tube and its secretions sustain the egg and the sperm, encouraging fertilization and nourishing the ovum until it reaches the uterus. if the ovum divides after fertilization, identical twins are produced. if separate eggs are fertilized by different sperm, the mother gives birth to non-identical or fraternal twins.
human sexuality