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Can birth control affect mood and stress?

Do hormonal contraceptives increase depression risk? The short answer is it varies from person to person. But for most people, probably not.

News Arena Network - New Delhi - UPDATED: June 25, 2024, 11:01 AM - 2 min read

Can birth control affect mood and stress?

Can birth control affect mood and stress?

Representational Image (Llyods Pharmacy)


Hormone cycles are tightly controlled by the hormones themselves. When progesterone levels increase, it activates processes in cells that shut off the production of more progesterone. This is called a negative feedback loop.

 

Estrogen and progesterone from the daily pill, or other common forms of contraceptives such as implants or vaginal rings, cause the body to decrease production of those hormones, reducing them to levels observed outside the fertile window of the cycle. This disrupts the tightly orchestrated hormonal cycle required for ovulation, menstruation and pregnancy.

 

Brain effects of hormonal contraceptives 

 

Hormonal contraceptives affect more than just the ovaries and uterus.

 

The brain, specifically an area called the hypothalamus, controls the synchronisation of ovarian hormone levels. Although they’re called “ovarian hormones,” estrogen and progesterone receptors are also present throughout the brain.

 

Estrogen and progesterone have broad effects on neurons and cellular processes that have nothing to do with reproduction. For example, estrogen plays a role in processes that control memory formation and protect the brain against damage, while progesterone helps regulate emotion.

 

By changing the levels of these hormones in the brain and the body, hormonal contraceptives may modulate mood – for better or for worse.

 

Hormonal contraceptives interact with stress

 

Estrogen and progesterone also regulate the stress response – the body’s “fight-or-flight” reaction to physical or psychological challenges.

 

The main hormone involved in the stress response – cortisol in humans and corticosterone in rodents, both abbreviated to CORT – is primarily a metabolic hormone, meaning that increasing blood levels of these hormones during stressful conditions results in more energy mobilized from fat stores. The interplay between stress systems and reproductive hormones is a crucial link between mood and hormone contraceptives, as energy regulation is extremely important during pregnancy.

 

So, what happens to someone’s stress response when they’re on hormonal contraceptives? When exposed to a mild stressor – sticking an arm in cold water, for example, or standing to give a public speech – women using hormone contraceptives show a smaller increase in CORT than people not on hormone contraceptives.

 

Researchers saw the same effect in rats and mice – when treated daily with a combination of hormones that mimic the pill, female rats and mice also show a suppression of the stress response.

 

Hormonal contraceptives and depression 

 

Do hormonal contraceptives increase depression risk? The short answer is it varies from person to person. But for most people, probably not.

 

It’s important to note that neither increased nor decreased stress responses are directly related to risk for or resilience against depression. But stress is closely related to mood, and chronic stress substantially increases risk for depression.

 

By modifying stress responses, hormone contraceptives change the risk for depression after stress, leading to “protection” against depression for many people and “increased risk” for a minority of people. More than 9 out of 10 people who use hormonal contraceptives will not experience decreased mood or depression symptoms, and many will experience improved mood.

 

But researchers don’t yet know who will experience increased risk. Genetic factors and previous stress exposures increase the risk for depression, and it seems that similar factors contribute to mood changes related to hormone contraception.

 

Currently, hormone contraceptives are usually prescribed by trial and error – if one type causes side effects in a patient, another with a different dose, delivery method or formulation might be better. But the process of “try-and-see” is inefficient and frustrating, and many people give up instead of switching to a different option.

 

Identifying the specific factors that increase depression risk and better communicating the benefits of hormone contraception beyond birth control can help patients make more informed healthcare decisions. 

 

This article first appeared in The Conversation.




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