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Video reveals the serotine bat may be the first mammal known to mate without using penetration, ... Wonder Theory science newsletter. ... storing sperm to extending the duration of a pregnancy ...
Parthenogenesis (/ ˌ p ɑːr θ ɪ n oʊ ˈ dʒ ɛ n ɪ s ɪ s,-θ ɪ n ə-/; [1] [2] from the Greek παρθένος, parthénos, 'virgin' + γένεσις, génesis, 'creation' [3]) is a natural form of asexual reproduction in which the embryo develops directly from an egg without need for fertilization.
Telegony is a largely discredited theory of heredity holding that offspring can inherit the characteristics of a previous mate of the female parent; thus the child of a woman might partake of traits of a previous sexual partner.
Pregnancy rates for sexual intercourse are highest during the menstrual cycle time from some 5 days before until 1 to 2 days after ovulation. [16] For optimal pregnancy chance, there are recommendations of sexual intercourse every 1 or 2 days, [ 17 ] or every 2 or 3 days. [ 18 ]
The best way to minimize your chances is to not have penile-vaginal intercourse after anal sex without a condom, Dr. Shepherd says. "Sperm can still be present, and also, another ejaculation can ...
Shallow penetration coupled with the sperm deposited close to the entrance favors female conception because the area is more acidic, which inhibits the weaker Y sperm, according to the hypothesis. To allow the Y sperm, which supposedly moves faster, to reach the egg first, use deeper penetration to deposit the sperm at the least acidic area ...
“Pregnancy can be extremely uncomfortable, especially toward the end of pregnancy,” notes Harper. “Penetrative sex can sometimes add to that discomfort, which is an opportunity to ...
Polyspermy, while physiologically possible in some species of vertebrates and invertebrates, is a lethal condition for the human zygote. Polycystic ovary syndrome is a condition in which the woman does not produce enough follicle stimulating hormone and excessively produces androgens. This results in the ovulation period between contact of the ...