Contraceptive pills are very effective with lesser side effects and are well accepted by the female. They work by
Inhibiting ovulation
Inhibiting implantation
They alter the quality of cervical mucus to prevent/retard the entry of sperms
All of these
What is the significance of progesterone-estrogen combination as a contraceptive measure ?
Give differences : Vasectomy and Tubectomy
Choose the correct option for $A, B, C$ and $D$
$A$ : Lactational amenorrhoea is due to high level of prolactin.
$R$ : Prolactin stimulates the release of gonadotropins
Example of copper releasing $IUD$ is