Folate for oral contraceptive users may reduce cervical cancer risk.

Adverse reactions commonly reported by combined oral contraceptive users are irregular uterine bleeding, nausea, breast tenderness, and headache.

Factors affecting riboflavin requirements of oral contraceptive users and non-users.

Riboflavin nutriture of oral contraceptive users.

Since 1981, the number of oral contraceptive users between the ages of 15 and 44 has doubled, to 16.3 million.

Multivitamin supplementation in oral contraceptive users.

On average, in developed countries, condoms are the most popular method of birth control: 28% of married contraceptive users rely on condoms.

In the average less-developed country, condoms are less common: only 6-8% of married contraceptive users choose condoms.

Altogether, 18% of the world's contraceptive users rely on hormonal methods.

Injectable hormonal contraceptives are also used by a significant portion-about 6%-of the world's contraceptive users.