contraception

Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.

A device that releases synthetic hormones slowly over time could one day provide a more practical alternative to daily birth control pills, say scientists.

Bardin’s work helped lead to the development of long-acting contraceptive devices for women.

A microneedle patch can subcutaneously deliver a contraceptive hormone to rats.

George Rosenkranz was part of a team in Mexico City that first synthesized norethindrone in 1951.

Such differences may help explain accidental pregnancies among women on the pill, researchers say.

A long-acting contraceptive patch with microscopic needles releases a drug slowly over time.

The gel, which men rub on their upper bodies daily, delivers synthetic progestin to block the testes from producing normal levels of sperm.

Sperm-binding, peptide–coated beads work as an implantable contraception device in mice and as a means of selecting human sperm for assisted reproduction techniques, researchers show. 

Carl Djerassi, who synthesized a hormone that was key to the creation of the birth control pill, has passed away at age 91.

Did 20th-century pharmaceutical and technological advances shape modern sexual behaviors?

In a proof-of-principle study, genetic deletion of two genes renders male mice infertile by preventing sperm transport through the vas deferens.

A new study suggests a possible link between the use of oral contraceptives and rising prostate cancer rates.