How Older Brothers Affect Male Sexuality | Dr. Marc Breedlove & Dr. Andrew Huberman
Dr. Marc Breedlove and Dr. Andrew Huberman discuss the fraternal birth order effect, the maternal immunization hypothesis, and why older brothers raise the odds of being gay.Dr. Marc Breedlove is a professor of neuroscience at Michigan State University and an expert on how hormones shape brain development and sexual orientation. Dr. Andrew Huberman is a tenured professor of neurobiology and ophthalmology at Stanford University School of Medicine and host of the Huberman Lab podcast.
Watch the full episode: https://youtu.be/6-mEiwe2NhE
Show notes: https://go.hubermanlab.com/iJe27oR
*Timestamps*
00:00 Older Brothers & Sexual Orientation
01:44 Sex Ratio of Older Siblings
02:40 Linear Effect per Brother
03:15 No Individual Predictive Value
04:36 Social Upbringing Hypothesis
05:43 Stepbrothers vs Biological Brothers
06:11 Maternal Immunization Hypothesis
07:34 Neuroligin 4Y Antibodies
08:56 Many Paths to Sexual Orientation
09:35 Sisters & Younger Brothers
#HubermanLab #MarcBreedlove #SexualOrientation
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