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A large scale study in Norway showed that across all breeds, about 4% of pups will be stillborn and a further 4% will die within the first week (early neonatal mortality). Between 8 days and 8 weeks, 1% will die. Litter size, breed size and age of the female is associated with increased risk.
A 1996 study by Pendergrass et al. using vinyl polysiloxane castings taken from the vaginas of 39 Caucasian women, found the following ranges of dimensions: [3] lengths (measured using rods): 6.9 to 14.8 cm (2.7 to 5.8 in); widths: 4.8 to 6.3 cm (1.9 to 2.5 in); introital diameters: 2.4 to 6.5 cm (0.94 to 2.56 in)
One difference between the glans penis and the glans clitoridis is that the glans clitoridis packs nerve endings into a volume only about one-tenth the size of the glans penis. Therefore, the glans clitoridis has greater variability in cutaneous corpuscular receptor density (1-14 per 100× high-powered field) compared with the glans penis (1-3 ...
Female dogs bleed during estrus, which usually lasts from 7–13 days, depending on the size and maturity of the dog. Ovulation occurs 24–48 hours after the luteinizing hormone peak, which occurs around the fourth day of estrus; therefore, this is the best time to begin breeding.
Typically, the glans is roughly the size and shape of a pea, and can vary in size from about 6 mm to 25 mm (less than an inch). [12] The size can also vary when the clitoris is erect , [ 8 ] which happens when two regions of erectile tissue known as the corpora cavernosa (along with the bulbs and crura , which both constitute the root of the ...
Although present in both men and women, the mons pubis tends to be larger in women. [1] [6] Its fatty tissue is sensitive to estrogen, causing a distinct mound to form with the onset of female puberty. [4] [6] [7] [8] This pushes the forward portion of the labia majora out and away from the pubic bone. The mound also becomes covered with pubic ...
The uterus can be divided anatomically into four regions: the fundus – the uppermost rounded portion of the uterus above the openings of the fallopian tubes, [4] the body, the cervix, and the cervical canal. The cervix protrudes into the vagina. The uterus is held in position within the pelvis by ligaments, which are part of the endopelvic ...
The cervix grows in size at a smaller rate than the body of the uterus, so the relative size of the cervix over time decreases, decreasing from being much larger than the body of the uterus in fetal life, twice as large during childhood, and decreasing to its adult size, smaller than the uterus, after puberty. [10]