Bayer AG has received antitrust clearance from the Federal Trade Commission for its approximately $1.1 billion acquisition of Conceptus.

Bayer announced the deal last month, saying that it would help to expand the kinds of birth control it offers.

Mountain View, Calif.-based Conceptus Inc. makes Essure, an irreversible birth control method in which small metal and polyester coils are inserted to block a woman’s fallopian tubes. The procedure can be done in 10 minutes in a doctor’s office.

Bayer already markets birth control pills and intrauterine devices.

The transaction could be completed by midyear.