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BMJ (Clinical Research Ed.)To find out whether taking images of the male and female genitals during coitus is feasible and to find out whether former and current ideas about the anatomy during...
OBJECTIVE
To find out whether taking images of the male and female genitals during coitus is feasible and to find out whether former and current ideas about the anatomy during sexual intercourse and during female sexual arousal are based on assumptions or on facts.
DESIGN
Observational study.
SETTING
University hospital in the Netherlands.
METHODS
Magnetic resonance imaging was used to study the female sexual response and the male and female genitals during coitus. Thirteen experiments were performed with eight couples and three single women.
RESULTS
The images obtained showed that during intercourse in the "missionary position" the penis has the shape of a boomerang and 1/3 of its length consists of the root of the penis. During female sexual arousal without intercourse the uterus was raised and the anterior vaginal wall lengthened. The size of the uterus did not increase during sexual arousal.
CONCLUSION
Taking magnetic resonance images of the male and female genitals during coitus is feasible and contributes to understanding of anatomy.
Topics: Adult; Arousal; Coitus; Feasibility Studies; Female; Genitalia, Female; Genitalia, Male; Humans; Magnetic Resonance Imaging; Male; Penis; Uterus
PubMed: 10600954
DOI: 10.1136/bmj.319.7225.1596 -
Hormones and Behavior May 2011In men and women sexual arousal culminates in orgasm, with female orgasm solely from sexual intercourse often regarded as a unique feature of human sexuality. However,...
In men and women sexual arousal culminates in orgasm, with female orgasm solely from sexual intercourse often regarded as a unique feature of human sexuality. However, orgasm from sexual intercourse occurs more reliably in men than in women, likely reflecting the different types of physical stimulation men and women require for orgasm. In men, orgasms are under strong selective pressure as orgasms are coupled with ejaculation and thus contribute to male reproductive success. By contrast, women's orgasms in intercourse are highly variable and are under little selective pressure as they are not a reproductive necessity. The proximal mechanisms producing variability in women's orgasms are little understood. In 1924 Marie Bonaparte proposed that a shorter distance between a woman's clitoris and her urethral meatus (CUMD) increased her likelihood of experiencing orgasm in intercourse. She based this on her published data that were never statistically analyzed. In 1940 Landis and colleagues published similar data suggesting the same relationship, but these data too were never fully analyzed. We analyzed raw data from these two studies and found that both demonstrate a strong inverse relationship between CUMD and orgasm during intercourse. Unresolved is whether this increased likelihood of orgasm with shorter CUMD reflects increased penile-clitoral contact during sexual intercourse or increased penile stimulation of internal aspects of the clitoris. CUMD likely reflects prenatal androgen exposure, with higher androgen levels producing larger distances. Thus these results suggest that women exposed to lower levels of prenatal androgens are more likely to experience orgasm during sexual intercourse.
Topics: Adult; Arousal; Coitus; Female; Genitalia, Female; Humans; Libido; Middle Aged; Orgasm; Young Adult
PubMed: 21195073
DOI: 10.1016/j.yhbeh.2010.12.004 -
Nature Human Behaviour Dec 2021Age at first sexual intercourse and age at first birth have implications for health and evolutionary fitness. In this genome-wide association study (age at first sexual...
Age at first sexual intercourse and age at first birth have implications for health and evolutionary fitness. In this genome-wide association study (age at first sexual intercourse, N = 387,338; age at first birth, N = 542,901), we identify 371 single-nucleotide polymorphisms, 11 sex-specific, with a 5-6% polygenic score prediction. Heritability of age at first birth shifted from 9% [CI = 4-14%] for women born in 1940 to 22% [CI = 19-25%] for those born in 1965. Signals are driven by the genetics of reproductive biology and externalising behaviour, with key genes related to follicle stimulating hormone (FSHB), implantation (ESR1), infertility and spermatid differentiation. Our findings suggest that polycystic ovarian syndrome may lead to later age at first birth, linking with infertility. Late age at first birth is associated with parental longevity and reduced incidence of type 2 diabetes and cardiovascular disease. Higher childhood socioeconomic circumstances and those in the highest polygenic score decile (90%+) experience markedly later reproductive onset. Results are relevant for improving teenage and late-life health, understanding longevity and guiding experimentation into mechanisms of infertility.
Topics: Adolescent; Age Factors; Coitus; Female; Genetic Association Studies; Humans; Male; Parturition; Polymorphism, Single Nucleotide; Reproduction
PubMed: 34211149
DOI: 10.1038/s41562-021-01135-3 -
CMAJ : Canadian Medical Association... Sep 2023
Topics: Humans; Coitus; Hemorrhage
PubMed: 37696551
DOI: 10.1503/cmaj.230143 -
CMAJ : Canadian Medical Association... Dec 2023
Topics: Humans; Coitus; Hemorrhage
PubMed: 38110214
DOI: 10.1503/cmaj.230143-f -
Progres En Urologie : Journal de... Sep 2018Urinary incontinence may seriously impact quality of life, self-image and subsequently the sexual life. Beside this fact, urinary leakage can specifically occur during... (Review)
Review
INTRODUCTION
Urinary incontinence may seriously impact quality of life, self-image and subsequently the sexual life. Beside this fact, urinary leakage can specifically occur during sexual intercourse, formally named coital incontinence, and thus lead to specific alteration of the sexual life.
AIM
To analyse the prevalence, pathophysiological mechanisms and possible therapeutic options for coital urinary incontinence.
METHODS
Related terms to urinary incontinence and sexual dysfunction were search on PubMed database.
RESULTS
Whereas at least a quarter of incontinent women have a coital incontinence, this symptom was rarely spontaneously reported. Some women had only coital incontinence (7.6 to 20% of cases). In men, urinary incontinence during sexual intercourse was mainly observed after prostatectomy in 20 to 64% of cases. Coital incontinence requires precise assessment. Indeed, it can occur whatever the phase of coitus: local stimulation (20-30%), excitement (13-18%), penetration (62.9-68%), movements back and forth, orgasm (27-37.1%). Cervico-urethral hypermobility, sphincter incompetence, urethral instability, detrusor overactivity could be the principal physiopathological mechanisms. In men, the main cause was a stress incontinence secondary to sphincter deficiency. Specific therapeutic strategies have proved their effectiveness. The rehabilitative approach (RR=0.25, CI [0.06-1.01]), medicinal (anticholinergic were effective in 59% of cases) or surgical therapeutic (slings with an efficiency of 87%) was proposed to patients.
CONCLUSION
Coital incontinence is a common and troublesome symptom. Its precise assessment may suggest a specific mechanism and thus a specific treatment.
Topics: Coitus; Female; Humans; Male; Prevalence; Risk Factors; Sexual Dysfunction, Physiological; Urinary Incontinence
PubMed: 29866492
DOI: 10.1016/j.purol.2018.05.001 -
BMJ (Clinical Research Ed.) Feb 1996
Topics: Adolescent; Adolescent Behavior; Cognition; Coitus; Female; Humans; Risk Factors; Sexual Behavior
PubMed: 8601098
DOI: 10.1136/bmj.312.7028.390 -
Medical Science Monitor : International... Jan 2020BACKGROUND The aim of this study was to investigate factors affecting the sex lives of middle-aged women, and whether surgical menopause affects sexual function...
BACKGROUND The aim of this study was to investigate factors affecting the sex lives of middle-aged women, and whether surgical menopause affects sexual function differently from natural menopause, by comparing effects on sexual performance of women with similar demographic features. MATERIAL AND METHODS The study included 151 women with surgical menopause (SM), 357 women with natural menopause (NM), and 186 perimenopausal women (PM). The women were asked to complete a 6-question survey of sexual performance parameters. The relationship between the demographic and clinical features and hormone levels of the groups and sexual function parameters were evaluated. We also compared these parameters between the 3 study groups, and paired comparisons were made between the SM group and the NM group. RESULTS Demographic features, serum DHEA-S, total testosterone, and FSH levels were found to have statistically significant effects on sexual performance of women (p<0.05). The sexual function scores for the frequency of sexual desire, coitus, and orgasm were significantly higher in the PM group, whereas vaginal lubrication scores were lower compared to the NM and SM group (p<0.05). In paired comparison of NM and SM, the scores for the frequency of coitus, orgasm, and vaginal lubrication were significantly higher in the SM group, while sexual desire frequency scores were higher in the NM group (p<0.05). CONCLUSIONS Our study approached to this topic in an extended manner and found significant relationships between several demographic-clinical and hormonal factors. SM was found to not affect female sexual performance, except for sexual desire, more than NM.
Topics: Adult; Coitus; Dehydroepiandrosterone; Female; Follicle Stimulating Hormone; Humans; Libido; Menopause; Menopause, Premature; Middle Aged; Orgasm; Perimenopause; Sexual Behavior; Surveys and Questionnaires; Testosterone
PubMed: 31907344
DOI: 10.12659/MSM.921811 -
Postgraduate Medical Journal Nov 1999
Topics: Adolescent; Coitus; Contraception Behavior; Female; Health Promotion; Humans; Pregnancy; Pregnancy in Adolescence; Sexually Transmitted Diseases; United Kingdom
PubMed: 10621871
DOI: 10.1136/pgmj.75.889.641 -
Postgraduate Medical Journal Nov 1996The act of heterosexual coitus is associated with morbidity due to a variety of conditions as well as with a small risk of sudden death. Awareness of the presentation of... (Review)
Review
The act of heterosexual coitus is associated with morbidity due to a variety of conditions as well as with a small risk of sudden death. Awareness of the presentation of coital emergencies is essential to allow appropriate medical management and sexual counselling.
Topics: Cerebrovascular Disorders; Coitus; Emergencies; Female; Headache; Humans; Male; Penis; Priapism; Rupture
PubMed: 8944205
DOI: 10.1136/pgmj.72.853.653