Modern WisdomThe Psychological Impact Of Hormonal Birth Control - Dr Sarah Hill
CHAPTERS
- 0:00 – 2:28
Coming off the pill: “It felt like I woke up” + why Hill started studying birth control
Dr. Sarah Hill opens with research on how hormonal birth control may shift women’s preferences for masculinity, then explains how her own experience discontinuing the pill pushed her into the topic. She describes noticeable changes in energy, libido, and general engagement with life after stopping hormonal contraception, which led her to the broader scientific literature.
- •Evidence suggests pill use may reduce preference for masculine male faces (within-subject findings)
- •Hill’s research background: sexual behavior, mate attraction, hormones and motivation
- •Personal post-pill changes: energy, gym activity, libido, noticing men, novelty-seeking (music)
- •Her experience matched patterns already described in decades of research
- 2:28 – 7:27
How ovarian hormones shape the brain and behavior across the ovulatory cycle
Hill outlines how estradiol and progesterone fluctuate across the cycle and how those changes influence brain connectivity, motivation, and sexual behavior. She contrasts the periovulatory phase—when estradiol is high and fertility is greatest—with the progesterone-dominant luteal phase, which emphasizes rest, appetite, and reduced sexual interest.
- •Hormone shifts change brain structure/function (connectivity, dendritic spines)
- •Periovulatory window (roughly days 9–14): higher energy, libido, interest in men/sex, masculinity cues
- •Estradiol links to increased attraction, sexual behavior, and even interest in music/novelty
- •Post-ovulation progesterone: sleepiness, hunger, lower libido, safety/energy conservation orientation
- 7:27 – 15:57
Talking about hormones without stigma: women aren’t ‘more hormonal’ than men
Chris raises concerns that discussing hormonal influences can feel patronizing or politically charged. Hill reframes hormones as universal biological coordinators affecting everyone, highlights how men’s testosterone fluctuates in many contexts, and argues that acknowledging hormonal effects is descriptive—not demeaning.
- •Sexist misuse of ‘hormonal’ stereotypes vs. scientific reality
- •Both sexes’ moods/behaviors are hormonally influenced
- •Women’s cycles are predictable; men’s testosterone can fluctuate with diverse stimuli (time, status, cues)
- •Hormones coordinate whole-body priorities (sex, stress response, etc.)
- 15:57 – 19:02
What hormonal birth control does biologically: flattening the cycle and suppressing ovulation
Hill explains the core mechanism of hormonal contraception: a steady synthetic hormone signal that convinces the brain it’s in a luteal-like state, preventing follicle maturation and ovulation. This suppression also reduces endogenous estrogen production, which can affect libido and other estrogen-linked motivations.
- •Typical hormonal message: higher synthetic progestin + low synthetic estrogen
- •Brain reduces ovarian stimulation → no follicle maturation → no ovulation
- •Ovulation is a major route for women’s own sex hormone production, especially estrogen
- •Low estrogen environment helps explain common libido reductions
- 19:02 – 26:22
Mate choice shifts on the pill: masculinity preferences, partner selection, and sexual frequency
The conversation moves from libido to partner preferences. Hill reviews evidence that naturally cycling women show stronger preferences for masculinity cues near high fertility, and discusses findings that pill use may dampen these preferences—potentially influencing who women choose and later relationship sexual dynamics when they discontinue the pill.
- •High fertility linked to preference for masculine faces/voices/testosterone scent
- •Studies: women on the pill show reduced preference for masculine facial features
- •Partner-choice studies: men chosen while women were on the pill appear less facially masculine on average
- •New survey/app-based work: women who met partners on the pill report less sex with those partners later, despite similar logged libido
- 26:22 – 28:59
Relationship outcomes after stopping birth control: satisfaction depends on partner attractiveness
Chris explores the possibility of relationship turmoil when women discontinue hormonal birth control. Hill describes longitudinal married-couple research suggesting changes in sexual and relationship satisfaction after stopping the pill, with directionality depending on how attractive the husband is perceived to be.
- •Stopping HBC can shift sexual/relationship satisfaction within couples
- •For women with more attractive husbands: desire and attraction can increase post-pill
- •For women with less attractive husbands: satisfaction and desire can decrease post-pill
- •Interpretation: restored estrogen-linked attraction mechanisms may re-weight priorities
- 28:59 – 35:48
Birth control and the ‘mating crisis’: achievement, hypergamy, and male motivation feedback loops
They zoom out to population-level implications: women’s educational and career gains after the pill and the potential for altered mate preferences in a modern dating market. Hill and Chris also speculate on an additional feedback loop: widespread suppression of ovulation could reduce environmental fertility cues that might influence men’s testosterone and motivation.
- •Pill access enabled women’s long-term planning; large increases in professional schooling participation
- •Apps make ‘objective metrics’ (education/job) more salient in mate selection
- •Speculation: fewer ovulating women → fewer fertility cues → possible effects on men’s testosterone
- •Broader context: declining testosterone trends and multiple contributing factors (obesity, endocrine disruptors, etc.)
- 35:48 – 41:44
Casual sex economics and incentives: how standards shape male behavior (and responsibility caveats)
Chris argues that lowering the costs of sex changes incentives for men to develop provider/dad-like traits, while Hill agrees that sexual access can shape male motivation. Hill adds nuance: this is not about blaming women for men’s choices, but about recognizing how technological changes (contraception) can shift cultural dynamics and mating strategies.
- •Sex as a powerful motivator for men; standards influence effort/investment
- •Contraception reduces pregnancy risk → enables more casual sex historically
- •Potential cultural shift: less pressure for men to ‘rise’ if access is easier
- •Hill emphasizes this isn’t about making women responsible for male underperformance
- 41:44 – 46:23
Sexual orientation ‘nudges’: cycle effects, bisexual shifts, and menopause hypotheses
A personal anecdote prompts discussion about hormonal influences on sexual orientation or attraction patterns. Hill reports hearing many accounts of cycle- or pill-linked shifts, particularly among bisexual women, and she extends the idea to menopause as another hormonal transition that might influence attraction and partnership patterns in some individuals.
- •Anecdotal/common reports: attraction can shift across the cycle or with pill on/off
- •Often reported: off the pill can feel ‘more straight’ for some bisexual women (but varies)
- •Researchers have long suspected steroid hormones may influence sexual preference expression
- •Menopause: low estrogen state might contribute to late-life attraction shifts for some women
- 46:23 – 52:01
Depression, anxiety, and suicide risk: strongest signals in adolescents and possible long-term effects
Hill reviews large-scale evidence linking hormonal birth control to increased risk of depression and anxiety, with particularly pronounced effects in adolescents. They discuss the developing brain’s hormone sensitivity and emerging findings suggesting adolescent exposure may carry increased lifetime risk for major depressive disorder.
- •Recent decade of evidence: HBC associated with higher depression/anxiety and related outcomes
- •Adolescents (≤19) show larger risk increases than adults in some studies
- •Mechanism concern: sex hormones guide post-pubertal brain development
- •Early evidence suggests adolescent HBC use may elevate long-term MDD risk even after discontinuation
- 52:01 – 54:42
Interpreting modern mental health trends: social media vs. birth control and the need to hold complexity
Chris asks whether rising anxiety in girls could partly reflect increased hormonal birth control use alongside social media effects. Hill notes this is rarely controlled for and argues that politics and fear of backlash can suppress open inquiry—even though society should be able to hold both truths: contraception is empowering and can have significant side effects.
- •Question: have analyses of teen anxiety trends accounted for HBC prevalence?
- •Cultural reluctance to criticize birth control due to its importance (especially post-Roe)
- •Argument for nuance: contraception can be both beneficial and harmful depending on outcomes/individuals
- •Long-form discussion enables complexity vs. polarizing online discourse
- 54:42 – 1:00:05
Can men sense ovulation? Hidden fertility cues, attractiveness shifts, and how the pill may change social perception
They discuss concealed ovulation and whether people can detect fertility indirectly. Hill cites research suggesting ovulating women are rated as more attractive and show subtle behavioral/physiological changes (e.g., scent, dress, gait), implying hormonal birth control—by suppressing these shifts—could alter how others respond to a woman.
- •People may not consciously identify ovulation, but show preferences for high-fertility cues
- •Studies: silhouettes/gait rated sexier near high fertility; attractiveness shifts across cycle
- •Physiological/behavioral cues: scent and clothing choices vary with fertility
- •Implication: pill use may affect how men and women perceive/respond to someone
- 1:00:05 – 1:02:14
Why there’s no widely used male pill: incentives, trust, and unequal pregnancy costs
Hill explains that the central barrier is asymmetry of consequences: women bear pregnancy costs, so they tolerate more side effects and prefer control over reliability. She also notes that many women may be reluctant to trust male adherence in casual contexts, reinforcing the status quo.
- •Women face direct pregnancy costs → higher willingness to accept side effects
- •Men’s alternative is often ‘partner takes it’ → lower tolerance for side effects
- •Trust/adherence problem: women may not rely on men’s consistent use in casual settings
- •Control and risk management shape contraceptive responsibility distribution
- 1:02:14 – 1:09:43
The future of contraception: non-hormonal approaches, new mechanisms, and femtech pressure
Closing the main discussion, Hill argues the future should move beyond hormones toward targeted, mechanical or biochemical disruptions of conception with fewer systemic effects. She cites early-stage animal research on blocking a vitamin A derivative involved in spermatogenesis and emphasizes the need for more innovation and cultural pressure to improve options.
- •Vision: effective contraception that avoids systemic hormonal manipulation
- •Call to rethink conception mechanics for novel intervention points
- •Example: mouse work blocking a vitamin A derivative tied to sperm production (early/preclinical)
- •Birth control isn’t ‘solved’; femtech and public pressure may drive better solutions
- 1:09:43 – 1:10:26
Finding Dr. Sarah Hill and final wrap-up
Chris asks where to find Hill’s work and they close the episode. Hill shares her website and social handles, followed by the show’s outro and subscription prompt.
- •Website: sarahehill.com
- •Social handle: @sarahehillphd
- •Episode wrap-up and thanks
- •Modern Wisdom end-screen/clip prompt
