Which form of birth control is injected every three months to remain effective?

The "birth control shot" is injected every three months (or 12-13 weeks) in order to remain effective.

The shot injects a hormone called progestin, which can prevent ovulation, so therefore, sperms cannot fertilise an egg because there's no egg released from the ovaries.

However, this method of birth control does not prevent people from getting STDs, so, doctors also recommend couples to practice other barrier birth control methods like condoms in order to prevent themselves from getting STDs.

i'm gonna put a couple so you can chose from

explanation:

if you know the fur color of the offspring mice, you can use the ratios to identify the genotypes of the parents.

if either parent mouse passes a dominant allele, the offspring will have black fur.

if the parental mice has two different fur color (i.e white and black) , the color of the offspring's fur would be either black, white, or the combination of both (grey)

hope this : )