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2. Concealed ovulation - Wikipedia

   en.wikipedia.org/wiki/Concealed_ovulation

   Concealed ovulation or hidden estrus in a species is the lack of any perceptible change in an adult female (for instance, a change in appearance or scent) when she is fertile and near ovulation. Some examples of perceptible changes are swelling and redness of the vulva in baboons and bonobos, and pheromone release in the feline family.

3. Pregnancy - Wikipedia

   en.wikipedia.org/wiki/Pregnancy

   A quantitative blood test can determine approximately the date the embryo was fertilized because hCG levels double every 36 to 72 hours before 8 weeks' gestation. [59] [78] A single test of progesterone levels can also help determine how likely a fetus will survive in those with a threatened miscarriage (bleeding in early pregnancy), but only ...

4. Induced ovulation (animals) - Wikipedia

   en.wikipedia.org/wiki/Induced_ovulation_(animals)

   Induced ovulation (animals) Induced ovulation is when a female animal ovulates due to an externally-derived stimulus during, or just prior to, mating, rather than ovulating cyclically or spontaneously. Stimuli causing induced ovulation include the physical act of coitus or mechanical stimulation simulating this, sperm and pheromones .

5. Superfecundation - Wikipedia

   en.wikipedia.org/wiki/Superfecundation

   Superfecundation. Superfecundation is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse, which can lead to twin babies from two separate biological fathers. [1] [2] The term superfecundation is derived from fecund, meaning able to produce offspring.

6. List of U.S. states and territories by population - Wikipedia

   en.wikipedia.org/wiki/List_of_U.S._states_and...

   The states and territories included in the United States Census Bureau 's statistics for the United States population, ethnicity, and most other categories include the 50 states and Washington, D.C. Separate statistics are maintained for the five permanently inhabited territories of the United States: Puerto Rico, Guam, the U.S. Virgin Islands ...

7. Google - Wikipedia

   en.wikipedia.org/wiki/Google

   Google was founded on September 4, 1998, by American computer scientists Larry Page and Sergey Brin while they were PhD students at Stanford University in California. Together, they own about 14% of its publicly listed shares and control 56% of its stockholder voting power through super-voting stock.