(1) The energey expenditure during coitus for long-married couples is equivalent to that of climbing stairs, and consequently the risk of heart attack is low.
(2) Decidual response also is produced in the immature rat after coitus-induced ovulation.
(3) Significantly, more of the patients aged below 30 years reported erection sufficient for coitus (p less than 0.05).
(4) Sterile coitus on the other hand, stimulates the uterine cervix in the rat and induces a physiological state of pseudopregnancy which interrupts the normal pattern of the oestrous cycle and establishes a persistent dioestrous state.
(5) Because of early age at initiation of intercourse and associated nonuse of contraception, half of first premarital pregnancies to teens occur in the first six months after they begin coitus; one-fifth occur in the first month.
(6) Among the strongest determinants of first coitus at those ages are infrequent church attendance, parental education of fewer than 12 years and black race.
(7) When correlated for age at first coitus, there was a significant excess of dysplasias in oral contraceptive users.
(8) In men, HIV seropositivity was associated with anal coitus (OR = 4.0), homosexual relations (OR = 3.96), sexual relations with infected persons (OR = 3.75), and sexual relations abroad (OR = 1.88); in women there was an association with intravenous drug use (chi 2 = 10.72) and with sexual relations abroad (OR = 12.67).
(9) The importance of adequately preparing the women emotionally and physically for coitus, a matter which certain males tend to ignore, is emphasized.
(10) Observations were made on excised female tracts 1-2 h post-coitus (pc) and 1-2 h before and after the approximate time of ovulation.
(11) Primary infertility, more prevalent among those born in 1946-60, was found to be related to a higher level of education, an urban life style and low age at first coitus.
(12) In couples that reported a satisfying sexual activity, the first coitus occurred 6 months after surgery (range: 4 to 15 months).
(13) It is concluded that the small number of sperm remaining in the vagina following coitus quickly become inactivated.
(14) The paper examines two aspects of coitus interruptus as a sexual practice: (1) how, in the age of fertility decline in Western Europe, its meaning was reinterpreted from an earlier theological view that condemned it as licentious to a nineteenth century view that emphasized restraint, and (2) how it was actually experienced by a socially stratified birth-controlling population in rural Sicily, ca 1900-1970.
(15) Coitus induced ovulation produced a characteristic oviductal motility pattern consisting of (i) initial relaxation of both isthmus and ampulla (4-12 h) followed by (ii) increased isthmic motility in the face of a continually relaxed ampulla (36-48 h), and finally phase (iii) leading to restitution of both ampullary and isthmic motility to the base-line at 72-96 h. Estimation of ova positions indicated the presence of fertilized eggs in the ampulla and ampullo-isthmic junction at 48 h and the ova could come to the end of the isthmic segment only at 72 h or after.
(16) The blastocysts obtained under a low oxygen-SOD culture condition were transplanted by direct insertion into the uterus of pseudopregnant females 3 days after infertile coitus.
(17) Comparison with previous investigations revealed that the average age at the first coitus showed a tendency to decrease in all three regions during the past 20-30 years.
(18) Four pony mares were readily infected with the organism of contagious equine metritis by intracervical inoculation and one by coitus with an infected stallion.
(19) These findings also point to the possible interference of certain pathologies in correlating AP activity and time since coitus.
(20) In both of the investigations, the majority stated that the first coitus was with a person of the same age group.
Copulation
Definition:
(n.) The act of coupling or joining; union; conjunction.
(n.) The coming together of male and female in the act of generation; sexual union; coition.
Example Sentences:
(1) Using allozymes as the genetic probe, data are presented which show that wild Drosophila buzzatii females and males engaged in copulation mate at random.
(2) The inhibition is desappears if placed under copulation conditions during a full cycle.
(3) Circular cuts which surgically isolated the medial basal hypothalamus (MBH) from the remainder of the brain did not prevent copulation 4 to 24 h later, but did block reflex ovulation.
(4) Eight rats of the PCPA group and only two of the vehicle, started to copulate.
(5) Incubation of normal pig lymphocytes in serum samples collected from 10 sows immediately before, and at daily intervals after mating with a vasectomized boar significantly elevated the rosette inhibition titre (RIT) of a standard antilymphocyte serum in 6 animals on the first but not on the 2nd and 3rd day after copulation.
(6) Duration of copulation in mixed combinations of D. athabasca is determined by the male.
(7) In Rhodotorula, peroxisomes are characterized by the same "bean" configuration and paired arrangement imitating "copulation" as mitocondria.
(8) On average, copulation lasted 27.2 s and was completed in flight.
(9) The surface membrane enzyme activity disappears from the zygote shortly after copulation and at the same time lysosome-like bodies start to appear in the cytoplasm.
(10) There was no seasonal fluctuation in copulative activity.
(11) Since courtship song increases a females' receptivity to copulation, the frequency of mating within a short observation period was used as a measure of the ability of mutant females to distinguish between singing males and males that were unable to sing.
(12) Copulations with other adults males also occurred during all cycle phases, but were most frequent peri-ovulatory.
(13) Copulation occurred more often on the occasion of the first attempt by the male.
(14) In the second experiment, intact females copulated twice with a male: once when they were able to hear and once when they were temporarily deafened with a medical ear mold.
(15) The gene products are secreted into the male duct and transferred to the female copulant during copulation.
(16) Pregnant C3H mice were exposed to teratogenic doses of cyclophosphamide (CPA), on the 11th day after copulation.
(17) Thiazide-type diuretics also produce erectile dysfunction in rats and interfere with normal copulation.
(18) Morphine administered rats showed a loss of weight, hypertrophy of the adrenals, decreased weight of accessory sex organs, low sperm count, and decreased copulation rate.
(19) La Crosse virus was detected in the bursa of females after induced copulation, and disseminated infection was shown to occur occasionally.
(20) Mangabeys spend 47% of activity observations feeding, 27% moving, and the remainder of the activity observations is accounted for by grooming, playing, vocalizing, copulating, etc.