Bad Science Fuels Misleading Claims Against Birth Control Pill

In an era of heightened scrutiny around reproductive health, misinformation about birth control continues to circulate widely across social media platforms and podcasts. One particularly persistent claim – that hormonal contraceptives shrink the clitoris by up to 20 percent – has gained traction in recent months, causing unnecessary alarm among contraceptive users.

The claim recently resurfaced on the popular Huberman Lab podcast, where guest Dr. Sara Gottfried stated that the birth control pill “can shrink the clitoris by up to 20%” and later reiterated that it can “trick your clit by up to 20%.” This assertion, presented without qualification, has since been amplified across social media channels.

Medical experts, however, caution that this alarming statistic stems from deeply flawed research that fails to meet basic scientific standards.

The primary source for the “20% shrinkage” claim appears to be a small 2014 pilot study by researchers led by Battaglia, which evaluated clitoral volume via ultrasound in just 40 women before and after using hormonal contraception. While the study reported a 24% decrease in clitoral volume after six months, the methodology contains critical limitations that undermine its reliability.

“With only 19-21 women per group and no placebo control, this study simply wasn’t designed to establish causation,” explained Dr. Jennifer Gunter, an OB-GYN who has analyzed the research. “The statistical significance barely reached the threshold of p=0.05, which in a small pilot study with multiple outcomes measured is highly susceptible to random chance.”

The study’s flaws go beyond sample size. There was no control group, no standardization of follow-up measurement timing, and questionable ultrasound methodology that could have introduced measurement bias. Perhaps most troublingly, the authors claimed their findings “confirmed” results from their previous work – a 2009 study that didn’t actually examine hormonal contraception at all.

In stark contrast to these pilot studies, a much larger and more robust 1992 study measured clitoral dimensions in 200 women, with no difference found between oral contraceptive users and non-users. This contradictory evidence has been largely ignored in sensationalized social media posts.

Experts also note that ultrasound may not be the ideal tool for measuring clitoral volume. The researchers’ own previous studies show baseline clitoral volume measurements that vary by up to 30% between their different research papers, raising serious questions about the precision of their measurement techniques.

“If we’re going to make claims about anatomical changes, we need MRI studies with proper controls,” said one reproductive health researcher who requested anonymity. “Ultrasound introduces too many variables, especially when measuring small structures with complex anatomy like the clitoris.”

The reproductive health community has expressed growing concern about the spread of contraception misinformation during a time when access to birth control faces increasing political challenges. The reproductive anatomy expert community has called for more responsible scientific communication, particularly on platforms with large audiences.

“The amount of energy required to refute medical misinformation vastly exceeds the effort needed to create it,” Dr. Gunter noted, referencing Brandolini’s law. “When influencers and podcast hosts present preliminary research as established fact without critical analysis, it erodes trust in both contraception and science more broadly.”

For the millions of women using hormonal contraception, medical professionals emphasize that decisions about birth control should be based on comprehensive, evidence-based information rather than sensationalized claims from poorly designed pilot studies.

“False claims about contraception don’t just spread misinformation – they potentially interfere with people’s reproductive autonomy by creating unfounded fears,” said a spokesperson from the American College of Obstetricians and Gynecologists. “When we care about reproductive freedom, accuracy isn’t optional – it’s essential.”

As research into reproductive anatomy continues to evolve, including promising work with advanced MRI imaging techniques, the scientific community hopes for more rigorous studies that can provide women with reliable information about contraceptive effects – rather than alarming statistics based on methodologically weak research.