#anticoncepción #sexo #oral contraceptives+3

9 Myths About Oral Contraceptives

28 de octubre de 2025

3 min de lectura

Do you want to start taking COCs, but are afraid of gaining weight, not getting pregnant, or losing libido? Let’s disprove some popular myths.

Puntos clave

Do you want to start taking COCs, but are afraid of gaining weight, not getting pregnant, or losing libido?
COCs cause infertility
COCs make you fat

Para quién es

Personas que exploran Salud de la mujer a través de anticoncepción, sexo.

Por qué importa

Este artículo te ayuda a orientarte rápidamente y luego avanzar a una colección o serie si quieres seguir profundizando.

Autor del artículo

Dra. Asya

Asesora científica

Científico jefe de Ornament Health AG Endocrinólogo Doctor en Ciencias Médicas Graduado de la Escuela de Estudios Avanzados SISSA, Trieste, Italia, con una especialización en enfermedades neurodegenerativas Anteriormente: Becario de investigación, Universidad de Oslo Mejor científico joven de Italia, 2006 Ganador de la beca internacional Human Frontier ## Experiencia Elina dirige el equipo internacional de científicos médicos de Ornament Health AG y es responsable de la información médica y científica y de la prevención de enfermedades. Elina también dirige el consejo asesor científico internacional y aporta su experiencia científica profesional en las áreas de desarrollo más prometedoras de la empresa. Anteriormente, Elina Sharifullina trabajó para la empresa biofarmacéutica internacional Swedish Orphan Biovitrum (SOBI), gestionando el marketing en Rusia y los países de la CEI. También trabajó con la empresa internacional MSD (EE.UU.) en medicamentos para el tratamiento de la diabetes mellitus y fue asesora médica de la oficina de Moscú de Eli Lilly (EE.UU.) en el campo de la endocrinología. Elina se graduó en la Universidad Médica Estatal de Kazán con una especialización en endocrinología y, en 2006, se doctoró en enfermedades neurodegenerativas en la Escuela Internacional de Investigación Avanzada SISSA (Trieste, Italia). De 2007 a 2010, Elina fue becaria de investigación en la Universidad de Oslo (Noruega). Elina ha dedicado la mayor parte de su vida a la ciencia y la medicina, investigando en los campos de la diabetes mellitus, la obesidad, las enfermedades del sistema nervioso central y el biohacking. Fue galardonada con el título de mejor científica joven de Italia en 2006 y es la ganadora de la beca internacional Human Frontier.

Experto en salud

Combined oral contraceptives (COCs) are pills containing two hormones — estrogen and progestogen. There are many myths around them, most of them based on fears and rumors. Let’s take a look at the actual truth about COCs. Spoiler alert: Something did turn out to be true!

COCs cause infertility

On the contrary, it is extremely easy to conceive a child in the first year after you stop taking COCs. The ovaries "rest" while taking the pills, since ovulation does not occur. Plus, the hormonal background settles and the risk of endometriosis decreases.

COCs make you fat

Women really did gain weight with the first hormonal contraceptives, but modern ones contain small doses of hormones. Studies have proven that today’s COCs do not cause weight gain. On the contrary, some COCs even contribute to weight loss. However, contraceptives can provoke the accumulation of fluid in the tissues before menstruation, which really increases body weight.

COCs reduce libido

In rare cases, there may indeed be a decrease in libido. As a rule, this happens only when you start taking them. This is because a woman's body adapts to taking birth control pills, so a decrease in libido can be observed only in the first months. Antiandrogenic activity may occur upon use of pronounced therapeutic effect drugs, which also partly suppresses libido.

But there are contraceptives, for example, based on an almost natural hormone, that is nearly completely devoid of this side effect. However, it is worth remembering that a woman's libido is a rather complicated aspect, and not everything depends only on hormones.

Taking COCs is a method of preventing breast and cervical cancer. Studies have found and confirmed that hormonal contraceptives reduce the likelihood of developing endometrial and ovarian cancer. The "protective" effect persists for several years after the drug is stopped.

The risk of developing endometrial cancer is reduced by 50%, and the risk of colon cancer and ovarian cancer is reduced by 30%. Oral contraceptives do not affect the development of breast cancer in any way — they neither increase nor decrease such risk. Cervical cancer is only cancer with a proven viral nature. This means that no contraceptives can affect its occurrence.

However, COCs help in the prevention of ovarian cysts, uterine fibroids and other common female problems.

COCs don’t get rid of acne

It has been found that androgens (male sex hormones) increase the activity of the sebaceous glands and the secretion of sebum. Some COCs contain progestins with an antiandrogenic effect, which help to cope with acne.

COCs increase the risk of thrombus

It is true that the formation of a thrombus (or blood clots) inside the vessels is well connected with increased activity of the blood coagulation system, caused by COCs.

The possibility of such complications increases with the presence of risk factors (age over 35, smoking, arterial hypertension, obesity). It largely depends on the dose of estrogen that is part of the contraceptive. However, it is generally agreed that low-dose and micro-dose COCs do not cause blood clots inside the vessels for healthy women.

Long-term use of COCs can postpone menopause

COCs help women feel better when close to menopause and protect bones from brittleness and osteoporosis. Hot flashes before menopause are almost absent or stop altogether when hormonal contraceptives are being taken.

Missing a single COC tablet cannot lead to pregnancy

If guidelines are not followed when taking oral contraceptives, it is quite possible to become pregnant. In case a woman forgets to take the pill, she should take it as soon as she remembers and uses barrier methods of contraception within seven days. Pills must be taken regularly, and preferably at the same time.

COCs can push back or accelerate the onset of menstruation

The birth control pill is sometimes used to "schedule" periods. Your gynecologist may tell you how to do it correctly so it’s not harmful. However, this is not often recommended.

When choosing a contraceptive, it is important to consider its indications and contraindications, effectiveness, and acceptability as well as the woman's age, health history, and reproductive system. Currently, there is no 100% effective contraceptive that can be prescribed to all women without risk to their health.

Therefore, if you decide to take COCs, it is very important to find “your” pill. Choose the dose of hormones that is right for you, depending on your hormonal balance and the general characteristics of your body.

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