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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. Homopaternal superfecundation is fertilization of two ...
Paternal age effect. The paternal age effect is the statistical relationship between the father's age at conception and biological effects on the child. [1] Such effects can relate to birthweight, congenital disorders, life expectancy and psychological outcomes. [2] A 2017 review found that while severe health effects are associated with higher ...
Calendar-based methods are various methods of estimating a woman 's likelihood of fertility, based on a record of the length of previous menstrual cycles. Various methods are known as the Knaus–Ogino method and the rhythm method. The standard days method is also considered a calendar-based method, because when using it, a woman tracks the ...
The Immaculate Conception is the belief that the Virgin Mary was free of original sin from the moment of her conception. It is one of the four Marian dogmas of the Catholic Church. [2] Debated by medieval theologians, it was not defined as a dogma until 1854, [3] by Pope Pius IX in the papal bull Ineffabilis Deus . [4]
The virgin birth of Jesus is the Christian and Islamic doctrine that Jesus was conceived by his mother, Mary, through the power of the Holy Spirit and without sexual intercourse. [1] Christians regard the doctrine as an explanation of the mixture of the human and divine natures of Jesus. [2] [1] The Eastern Orthodox Churches accept the doctrine ...
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A donor offspring, or donor conceived person, is conceived via the donation of sperm ( sperm donation) or ova ( egg donation ), or both (either from two separate donors or from a couple). For donor conceived people, the biological parent (s) who "donated" sperm or eggs (though most commonly "donors" are financially compensated so "donor", while ...
Family planning is the consideration of the number of children a person wishes to have, including the choice to have no children, and the age at which they wish to have them. Things that may play a role on family planning decisions include marital situation, career or work considerations, financial situations.
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