Final answer:
The preparation of synthetic female hormones designed to prevent ovulation is known as the Oral contraceptive pill. This fulfills the required action by introducing hormones that inhibit egg release.
Step-by-step explanation:
These pills contain synthetic derivatives of estrogen and/or progesterone, which work by preventing the release of an egg from the ovaries. There are different methods of administering hormones, including the oral contraceptive pill, which is taken daily. The intrauterine device (IUD) also offers a hormonal method that includes the release of hormones to create an inflammatory condition that prevents fertilized eggs from implanting in the uterine wall, but it does not fit the definition of the question as it is not an oral pill.