| 発情 | [はつじょう, hatsujou] (n, vs) sexual excitement; capable of breeding; having the urge to breed [Add to Longdo] |
| 年中発情期 | [ねんちゅうはつじょうき, nenchuuhatsujouki] (n) year-round mating season [Add to Longdo] |
| 発情ホルモン | [はつじょうホルモン, hatsujou horumon] (n) estrogen; oestrogen [Add to Longdo] |
| 発情期 | [はつじょうき, hatsujouki] (n) mating season; estrus (oestrus); estrum; the rut [Add to Longdo] |
| 発情周期 | [はつじょうしゅうき, hatsujoushuuki] (n) estrous cycle [Add to Longdo] |