gamogenesisn.

1858 T. H. Huxley in Ann. & Mag. Nat. Hist. Sept. 215 If we inquire how this process [sc. agamogenesis] differs from multiplication by true ova, or ‘gamogenesis’, we find that the young ovum in the ovarium is also, to all intents and purposes, a bud.

1864 H. Spencer Illustr. Progress 370 Multiplying only by gamogenesis.

1888 W. R. Williams Princ. Cancer & Tumour Formation ii. 34 In the lowest organisms gamogenesis has never been observed, and in the highest organisms agamogenesis is absent.

1911 Pediatrics 23 525 Reproduction among human beings must, therefore, obey the law of gamogenesis; hence, two ancestors—male and female—contribute to the origin of every member of the human race.

1916 G. S. West Algæ I. 135 The zygospore is formed by the union of like (or nearly like) gametes, such as takes place in many of the Protococcales,..and is the result of a gamogenesis in which there are no external sexual differences between the gametes themselves.

1971 Limnol. & Oceanogr. 16 296/1 In Daphnia..the reproductive condition is a state not a stage, and..individual females can switch from gamogenesis to parthenogenesis or the reverse without difficulty.

2008 Aquatic Ecol. 42 151/2 Chydroids usually reproduce parthenogenetically during most of the ice-free period (early spring–late summer), while gamogenesis is restricted to autumn.