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Heteropaternal superfecundation is common in animals such as cats and dogs. Stray dogs can produce litters in which every puppy has a different sire. Though rare in humans, cases have been documented. In one study on humans, the frequency was 2.4% among dizygotic twins whose parents had been involved in paternity suits. [6]
The Mosie Baby Kit, which costs $129, includes two collection cups for semen, two "insemination syringes" and "supportive instructions" for use. The company advertises its syringe design on its ...
Once the fastest sperm have been isolated, before using them for artificial insemination or in vitro fertilization, it is important to confirm the absence of HIV virus in the sample. The sample obtained after washing is analysed, usually using the PCR technique, to check that there is no viral particle. If the result is negative, i.e. there is ...
Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. Internal fertilization, unlike its counterpart, external fertilization, brings more control to the female with reproduction. [1]
5. Catnip or valerian toys. The best catnip toys can help your feline relax, so you might want to incorporate them into your spa day. If your cat is one of the few who don't react to it, you can ...
A conception cap can assist to protect semen from the vaginal cavity and allow semen to pool against the cervical os. [8] [9] Around the time of ovulation, a conception cap or cervical cap is filled with semen and placed on a woman's cervical os for several hours to maximize the time the semen is available to fertilise a waiting egg.
4. Red prayer plant. The red prayer plant has variegated leaves that add a decorative flair to any cat-safe home. Its leaves, which can vary from gray-green to purple-green, fold at night to ...