- mean number of siblings
- <16> Среднее число братьев и сестер. Среднее преобразования Престона.
Сборный англо-русский словарь. Академик.ру. 2011.
Сборный англо-русский словарь. Академик.ру. 2011.
Sperm donation — is the provision (or ‘donation’) by a man, (known as a ‘sperm donor’), of his sperm, with the intention that it be used to impregnate a woman who is not usually the man s sexual partner, in order to produce a child. A sperm donor is the natural… … Wikipedia
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