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1 tive, and puberty), as well as engagement in sexual intercourse.
2 nancy after 12 months of regular unprotected sexual intercourse.
3 x assigned at birth and prior penile-vaginal sexual intercourse.
4 to identify the predictors of engagement in sexual intercourse.
5 HIV-1 transmission through breastfeeding and sexual intercourse.
6 th sudden deaths during or immediately after sexual intercourse.
7 of an ideal soundscape for best experiencing sexual intercourse.
8 ed whether respondents used a condom at last sexual intercourse.
9 ssociated (P < 5 x 10(-8)) with age at first sexual intercourse.
10 sk of E. coli vaginal colonization following sexual intercourse.
11 of the virus across mucosal surfaces during sexual intercourse.
12 of concordance were observed 24 hours after sexual intercourse.
13 sed mucosal surfaces during breastfeeding or sexual intercourse.
14 can be transmitted by injecting drug use and sexual intercourse.
15 t can be used up to 5 days after unprotected sexual intercourse.
16 role in reduction of HIV transmission during sexual intercourse.
17 nfection of a woman or a man by HIV-1 during sexual intercourse.
18 penile deformities that impede satisfactory sexual intercourse.
19 verseas partnerships, and condom use at last sexual intercourse.
20 women reporting a history of anal receptive sexual intercourse.
21 fections, were statistically attributable to sexual intercourse.
22 2-3 days, and 6-8 days) an index episode of sexual intercourse.
23 y the use of a diaphragm plus spermicide and sexual intercourse.
24 fter 1 month and first reported satisfactory sexual intercourse 1 week later (despite advice to the c
25 ated with lack of sexual competence at first sexual intercourse (1.90 [1.14-3.08]), reporting higher
26 rimary outcomes included (1) any unprotected sexual intercourse, (2) STI diagnoses, and (3) any unsaf
27 3% vs 18.1%; 1.34 [1.11-1.62] for male), and sexual intercourse (25.1% vs 15.1%; 1.23 [1.09-1.39] for
28 -2 incidence increased with alcohol use with sexual intercourse (adjusted incidence rate ratio [adjIR
29 zation of the mucus by alkaline semen, after sexual intercourse, allows virions to cross the mucus la
30 er a 6-week period, including 24 hours after sexual intercourse and after 48 hours of abstinence.
35 lescent pregnancy, such as history of forced sexual intercourse and lack of connectedness with parent
36 months before and after first penile-vaginal sexual intercourse and measured the concentrations of 20
37 No relation between lifetime frequency of sexual intercourse and risk of prostate cancer was appar
38 untries because discussion of issues such as sexual intercourse and sexuality make people feel uncomf
39 e participants rarely used protection during sexual intercourse and some symptomatic subjects apparen
40 ajor viral population that is transmitted by sexual intercourse and that replicates in infected indiv
42 to assess the relation between age at first sexual intercourse and these STIs and to examine variati
43 l cause of anal cancer, is increased by anal sexual intercourse and worsened by human immunodeficienc
44 ells via breast-feeding by infected mothers, sexual intercourse, and contaminated blood products.
45 ffective in blocking HIV transmission during sexual intercourse; and, in three randomised trials, mal
47 duals and advising the recovery men to avoid sexual intercourse are efficient ways for the eradicatio
48 sexual fantasies, masturbated, or engaged in sexual intercourse at least once a week increased two to
50 sociated with unplanned pregnancy were first sexual intercourse before 16 years of age (age-adjusted
51 huge proportion of adolescents who engage in sexual intercourse begin early; therefore, it is crucial
53 PV infection through abrasion of the skin or sexual intercourse causes benign warts and sometimes can
57 , multiple sex partners within <30 days, and sexual intercourse during menses in the previous 6 month
59 HR = 1.7, 95% CI: 1.1, 2.5), having frequent sexual intercourse during the past 4 months (HR = 1.5, 9
60 s of earlier puberty timing on earlier first sexual intercourse, earlier first birth and lower educat
66 V can be detected in the vagina before first sexual intercourse, highlighting the need for early vacc
67 rticipants were less likely to report having sexual intercourse in the 3 months after intervention th
68 efined as using a condom at each occasion of sexual intercourse in the previous 12 mo; (b) recent con
69 f sexually experienced women who reported no sexual intercourse in the previous 3 months (secondary a
70 e safer-sex intervention group reported less sexual intercourse in the previous 3 months at 6- and 12
71 nd tenofovir for MSM who had condomless anal sexual intercourse in the previous 3 months, a negative
72 d with pyelonephritis risk were frequency of sexual intercourse in the previous 30 days (odds ratio,
73 likely causal consequences of earlier first sexual intercourse include reproductive, educational, ps
75 ceptive periods, such as humans and bonobos, sexual intercourse is known to be pleasurable for female
78 -II seropositivity was associated with early sexual intercourse (</=13 vs. >15 years; odds ratio [OR]
80 pecimens at baseline (all had abstained from sexual intercourse, masturbation, and vaginal product us
82 genome-wide association study (age at first sexual intercourse, N = 387,338; age at first birth, N =
83 nal discharge, chronic pelvic pain, avoiding sexual intercourse, odor associated with abnormal blood
84 for a rate per 10 000 sex acts (episodes of sexual intercourse) of 8.9 vs 1.5, respectively (P<.001)
87 partners (ie, anyone with whom they had had sexual intercourse or injected drugs in the previous 3 y
88 Abstinence intervention stressed delaying sexual intercourse or reducing its frequency; safer-sex
89 0(6) PBMC, P = .02), and cannabis use during sexual intercourse (OR 2.8[1.2; 6.7], P = .02) were the
90 , 1.95; 95% CI, 1.08 to 3.50), had never had sexual intercourse (OR, 11.30; 95% CI, 2.56 to 49.91), d
91 al partners, probability of never having had sexual intercourse, or self-reported wellbeing in male p
96 t with a history of recurrent pain following sexual intercourse presented with complaints of intense
98 lude diabetes, functional disability, recent sexual intercourse, prior history of urogynecologic surg
99 ed by 567 (75%) involved patients, including sexual intercourse, rape, sexual molestation, and sexual
100 gly and independently associated with recent sexual intercourse, recent use of a diaphragm with sperm
101 d 3.54 in the HMO cohort, P=0.04) and recent sexual intercourse (respective relative risks for one, t
102 It is unknown whether beginning to have sexual intercourse results in changes to immune mediator
103 in couples were assessed for recency of last sexual intercourse, sexual activity in the prior year, a
104 itionally, reports of condom use during last sexual intercourse showed a non-significant 4.3% increas
105 23%-33%) (92/330) of PHIV(+) youth reported sexual intercourse (SI) (median initiation age, 14 years
106 nconvenient, must be used before each act of sexual intercourse, so a method that provides protection
107 y contraception between 72 h and 120 h after sexual intercourse, there were three pregnancies, all of
108 d from 1.7% (95% CI 0.7-3.3) for unprotected sexual intercourse to 14.4% (8.8-19.9) for conversion di
109 ratified by centre and time from unprotected sexual intercourse to treatment, with allocation conceal
110 ease in serodiscordance and the frequency of sexual intercourse together with a 33% decrease in condo
111 eived emergency contraception within 72 h of sexual intercourse (ulipristal acetate, n=844; levonorge
113 of men with at least 1 successful attempt at sexual intercourse was 61 % (71/ 117) for the sildenafil
116 who were recruited soon after they first had sexual intercourse, we show that disruption of the E2 ge
117 y contraception within 5 days of unprotected sexual intercourse were eligible for enrolment in this r
118 alation study, 69 percent of all attempts at sexual intercourse were successful for the men receiving
119 ut transmission can occur during unprotected sexual intercourse, which may be at the time of concepti
120 ast 90 days in which participants engaged in sexual intercourse while high on drugs and/or alcohol; a
122 th using illegal drugs (P < .001) and having sexual intercourse with 4 or more persons (P = .03); use
124 m 253 men who acknowledged having engaged in sexual intercourse with a woman during the preceding yea
130 aspects of the elevated risks of unprotected sexual intercourse with the New Year holiday (Valentine'
131 abstinent participants, females engaging in sexual intercourse with the use of condoms (odds ratio [
133 ncy contraception within 72 h of unprotected sexual intercourse, with a non-inferiority margin of 1%
135 ths (HR = 1.5, 95% CI: 1.1, 2.2), and having sexual intercourse within the 5 days prior to the follow
136 lways used a condom than among those who had sexual intercourse without one and (2) among female oral