Correct option is A
During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms
During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms
Hormones secreted by the placenta to maintain pregnancy are:
Oral contraceptive pills help in birth control by:
Human placenta is derived from:
Which one of the following sexually transmitted diseases (STD) correctly matches with its pathogen?
Acrosome reaction is triggered by:
Is there a Visible difference between sperms which contain X chromosomes and sperms which contain Y chromosomes?
The nutrients are supplied to the foetus from the mother through:
Which of the following is NOT a part of the female reproductive system?
What happens during menstruation?