I have been doing some research on affect of sex on women, for a project. Here are a couple of abstracts from the papers I found:
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Abstract:
A growing empirical literature demonstrates that the only sexual behavior consistently associated with indices of better physiological and psychological function is the one sexual behavior relevant to potential gene propagation. In the present study, 30 Portuguese women reported on their frequency of different sexual behaviors and corresponding orgasm rates and also completed the Perceived Relationship Quality Components (PRQC) Inventory. As hypothesized, frequency of penile-vaginal intercourse correlated positively with PRQC dimensions: Satisfaction, Intimacy, Trust, Passion, Love (all r ≥ .40) and Global Relationship Quality (r = .55). Noncoital sexual behaviors with a partner were uncorrelated with the PRQC dimensions. Masturbation frequency was inversely associated with Love (r = -.38). Penile-vaginal orgasmic frequency correlated positively with PRQC dimensions: Satisfaction, Intimacy, Passion, Love (all r ≥ .44) and Global Relationship Quality (r = .52). Penile-vaginal intercourse orgasmic consistency was inversely associated with masturbation frequency. Social desirability scores did not confound the associations. Results are discussed in terms of both evolutionary and psychoanalytic theories.
Costa, R. M. & Brody, S. (2007). Women’s relationship quality is associated with specifically penile-vaginal intercourse orgasm and frequency. Journal of Sex & Marital Therapy, 33, 319-327.
Abstract:
I examined the relationship of recalled and diary recorded frequency of penile-vaginal intercourse (FSI), noncoital partnered sexual activity, and masturbation to measured waist and hip circumference in 120 healthy adults aged 19-38. Slimmer waist (in men and in the sexes combined) and slimmer hips (in men and women) were associated with greater FSI. Slimmer waist and hips were associated with rated importance of intercourse for men. Noncoital partnered sexual activity had a less consistent association with slimness. Slimmer waist and hips were associated with less masturbation (in men and in the sexes combined). I discuss the results in terms of differences between different sexual behaviors, attractiveness, emotional relatedness, physical sensitivity, sexual dysfunction, sociobiology, psychopharmacological aspects of excess fat and carbohydrate consumption, and implications for sex therapy.
Abstract:
Penile–vaginal intercourse (PVI) but not other sexual behavior is associated with better psychological and physiological function. I
examined the relationship of sexual behavior patterns to blood pressure (BP) and its reactivity to stress (public speaking and verbal
arithmetic). For a fortnight, 24 women and 22 men used daily diaries to record PVI, masturbation, and partnered sexual behavior in the
absence of PVI. Persons who reported PVI (but no other sexual activities) had better stress response (less reactivity and/or lower baseline
levels) than persons reporting other or no sexual behaviors. Persons who only masturbated or had partnered sex without PVI had 14 mmHg
more systolic BP reactivity than those who had PVI but not the other behaviors. Many variables were examined but failed to confound the
observed relationships. The magnitude of the sexual behavior effect on BP reactivity is greater than of other factors in the literature. These
findings add to the research corpus on the benefits of PVI (differentiated from other sexual activities).
Abstract:
Research indicates that prolactin increases following orgasm are involved in a feedback loop that serves to decrease arousal through
inhibitory central dopaminergic and probably peripheral processes. The magnitude of post-orgasmic prolactin increase is thus a
neurohormonal index of sexual satiety. Using data from three studies of men and women engaging in masturbation or penile–vaginal
intercourse to orgasm in the laboratory, we report that for both sexes (adjusted for prolactin changes in a non-sexual control condition), the
magnitude of prolactin increase following intercourse is 400% greater than that following masturbation. The results are interpreted as an
indication of intercourse being more physiologically satisfying than masturbation, and discussed in light of prior research reporting greater
physiological and psychological benefits associated with coitus than with any other sexual activities.
2005 Elsevier B.V. All rights reserved.
**Abstract:
**We examined the relationship between recalled and diary recorded
frequency of penile-vaginal intercourse (FSI) and both resting heart
rate variability (HRV; an index of cardiac autonomic control and
parasympathetic tone associated with cardiovascular health outcomes)
and resting diastolic blood pressure (DBP) in 120 healthy
adults aged 19–38 (subjects scoring above the 87th percentile on
the Lie scale of the Eysenck Personality Inventory were excluded
from analyses). As in a previous smaller study, greater HRV was
associated with greater FSI (but not masturbation or non-coital sex
with a partner) and rated importance of intercourse. There were
no sex differences in the HRV-FSI relationship, and the relationship
was not explained by including measures of Extraversion, Neuroticism,
Depression, Trait Anxiety, or partnership satisfaction. However,
the previously obtained negative association of FSI with DBP
was not replicated.
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I don't have the name of the article and journal etc handy. But if you want them, I can find them.