During the process of fertilization and pregnancy, which becomes implanted on the uterine wall

Answer 1

During fertilization and pregnancy, it is the blastocyst that becomes implanted on the uterine wall. After a sperm fertilizes an egg, the resulting zygote undergoes several divisions to form a blastocyst. This blastocyst then travels down the fallopian tube and into the uterus, where it attaches to the endometrium (the uterine lining) in a process called implantation. This is a crucial step for establishing a successful pregnancy.