Which of the following cannot pass through the placenta into the foetus
Bacteria of syphilis
Thalidomide
Virus of German measles
None of the above
Cryptorchidism is a condition in which
During pregnancy which one of the following is excreted?
Which of the following are secretions produced by the spermatozoa at the time of fertilization?
Rapid secretion of $LH$ in ovulation causes
A freshly unfertilized egg of hen contains