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Original file (WebM audio/video file, VP8/Vorbis, length 1 min 50 s, 2,224 × 1,080 pixels, 2.52 Mbps overall, file size: 33.08 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Female cattle, also referred to as "heifers" in agriculture, will gradually enter standing estrus, or "standing heat," starting at puberty between 9 and 15 months of age. The cow estrous cycle typically lasts 21 days. [5] Standing estrus is a visual cue which signifies sexual receptivity for mounting by male cattle.
English: This video is an example of a man and woman having penile-vaginal intercourse in the standing position, a relatively normal example of sexual intercourse. It begins with the insertion of a man's erect penis into a woman's vagina at 0:07, followed by pelvic thrusts, becoming faster, initially to stimulate the vagina as it continues to lengthen and become lubricated.
In 2021, a study of 3017 American women identified the ways women have discovered to make vaginal sex with a male partner more pleasurable and arousing for themselves. "Angling": 87.5% of women find it pleasurable to circle their pelvis or lift and lower it to control where the penis pushes or rubs and how it feels.
The male is allowed to sniff a female in estrus. Experienced studs cooperate readily in the process. New studs often require encouragement in the form of manual stimulation. [43] Generally the male will mount the female, and the collector quickly directs the male's penis into the latex sleeve. The male ejaculates and the semen is collected in ...
Pyometra is a result of hormonal and structural changes in the uterus lining. This can happen at any age, regardless of how many heat cycles have occurred or previous pregnancies (or lack thereof), although it becomes more common as the dog gets older. The main risk period for a female is for eight weeks after her peak standing heat has ended. [2]
The evolutionary benefit to this phenomenon is that a male can fertilize multiple females. [6] The male may be reinvigorated repeatedly for successful insemination of multiple females. [7] This type of mating system can be referred to as polygyny, where one male has multiple female mates, but each female mates with only one or a few males. [5]
Here, the male passes the sperm to the female's egg-laying tube, which will soon be fertilised by the sperm. [159] Many animals make plugs of mucus to seal the female's orifice after mating. Normally such plugs are secreted by the male, to block subsequent partners. In spiders the female can assist the process. [160]