Behavioral and Brain Sciences. Normal and Problem Pregnancies. Females in fact have a lot to gain, depending on the species see here. Women tend to undervalue the number of their sex partners whereas men tend to overestimate the number of theirs. Polyandrous mating is positively correlated with testicle -to-body weight across bushcricket taxa see Sperm competition.
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Pregnancy nutrition don'ts Pregnancy nutrition basics Pregnancy weight gain Pregnant. Bisexual women tend to be less restricted in their sociosexual attitudes than both homo- and heterosexual women. More power to her! By Mayo Clinic Staff. Samoan tribal women exhibited a correlation between reproductive output and the likeliness of having androphilic grandsons, though not nephews see also Fa'afafine. Many species once thought monogamous, including such birds as swansare now known to engage in extra-pair copulations.