...Many authors maintain that impregnation takes place in the closed flower, but I am sure from my own observations that this is not the case, at least with those varieties to which I have attended... 
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...The influence of a first impregnation upon subsequent progeny by othermales is at times curiously illustrated...
Robert Jennings 「Sheep, Swine, and Poultry」
... WE will now consider the manner in which the impregnation of the queen-bee comes to pass...
Maurice Maeterlinck 「The Life of the Bee」
...Any animal or vegetable egg that had not received the life-giving impregnation would perish in the same way...
J. Henri Fabre 「Bramble-bees and Others」
...In many of the lower animals (such as sponges, polyps, and medusæ) the nakedova retain their original simple appearance until impregnation...
Ernst Haeckel 「The Evolution of Man」
...This error was partly due to theimperfect knowledge at that time of the facts of impregnation, and partly tothe strikingdifference in the sizes of the two sexual cells...
Ernst Haeckel 「The Evolution of Man」
...We have never yet had occasion todissect a woman immediately after impregnation and examine the stem-cell or thesegmentation-cells in her oviduct...
Ernst Haeckel 「The Evolution of Man」
...He found in the uterus of arabbit four days after impregnation small, round, loose, transparent vesicles,with a double envelope...
Ernst Haeckel 「The Evolution of Man」
...[Belief in the impregnation of women by the moon...
Sir James George Frazer 「Balder The Beautiful, Vol. I.」
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