In the IVF procedure, sperm and eggs “interact” in a dish leading to insemination.
They literally swim up to the egg and burrow toward the nucleus.
The first one to get there wins, and all others are blocked out.
Male fertility issue: Sometimes sperm cannot latch onto and penetrate the egg. They may choose to have Intra(within)- Cytoplasmic Sperm细胞质精子注射 Injection (ICSI)
[ ] ICSI----intracytoplasmic sperm injection