The mode of action of which of the following is similar to that of pills?

Injections and implants have similar mode of action as pills.

While there are differences between contraceptive injections, implants, and birth control pills, there are also several similarities. All three methods are forms of hormonal contraception, as they use synthetic hormones to prevent pregnancy. These hormones primarily work by inhibiting ovulation (the release of eggs from the ovaries), thickening cervical mucus to impede sperm movement, and altering the uterine lining to make it less receptive to implantation.

Vasectomy an tubectomy block the transport of gametes.

Lippes loop causes phagoctosis of sperm.