Birth control and dating

Yes, there are SO many options it can be overwhelming.

The fact of the matter is that choosing the right birth control has a ton of factors to consider from your goal, your abilities, your health, your future plans and so forth.

When individuals with different MHC genes mate, their offspring's immune systems can recognize a broader range of foreign cells, making them more fit.

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And the opposite is also true with matchng-MHC couples showing less satisfaction and more wandering eyes.

"Not only could MHC-similarity in couples lead to fertility problems," said lead researcher Stewart Craig Roberts, an evolutionary psychologist at the University of Newcastle in England, "but it could ultimately lead to the breakdown of relationships when women stop using the contraceptive pill, as odor perception plays a significant role in maintaining attraction to partners." Sexy scents The study involved about 100 women, aged 18 to 35, who chose which of six male body-odor samples they preferred.

If you want to avoid an estrogen-containing method, you can pair condoms with an intrauterine device (IUD)—either the hormone-free copper Para Gard or the progestin-containing Mirena.

Other good options include Implanon, a progestin-releasing implant that’s inserted in the upper arm for up to three years; and Depo-Provera, a progestin injection that’s given every three months.

Staying loyal to a great doctor or a genius hairdresser—that’s just smart.

But when it comes to birth control, sticking with the same method throughout the years isn’t always the right move.

That's because beneath a woman's flowery fragrance or a guy's musk the body sends out aromatic molecules that indicate genetic compatibility.

Major histocompatibility complex (MHC) genes are involved in immune response and other functions, and the best mates are those that have different MHC smells than you.

Here's a primer to help you sort through the options and find what's best for you: Best for the women who crave a schedule: If you’re the type that likes to stick to a routine so you don’t have to sweat the small stuff, the combination pill (aka The Pill, Combination Oral Contraceptive, or the COC Pill) might be something you want to pencil in to your routine.

The pill is composed of two hormones: estrogen and progestin, and together, they mimic the hormones you naturally produce and stop your little eggs from releasing or developing.

These preferences appear to translate to real life decisions: the men whose partners had been on the pill when they first started dating were found, as a whole, to be less masculine-looking.

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