Biology · PYQ NEET UG 2016(1)

Fertilization in humans is practically feasible only if:

1. The sperms are transported into vagina just after the release of ovum in fallopian tube
2. The ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix
3. The ovum and sperms are transported simultaneously to ampullary - isthmic junction of the fallopian tube
4. The sperms are transported into cervix within 48 hrs. of release of ovum in uterus