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| | The Ultimate Menarche Dog Breeds Information Guide and Reference (Site not responding. Last check: 2007-11-04) |
 | | When menarche occurs, it confirms that the female has had a gradual estrogen-induced growth of the uterus, especially the endometrium, and that the "outflow tract" from the uterus, through the cervix to the vagina, is open. |
 | | When menarche has failed to occur for more than 3 years after thelarche, or past 14.5 years of age, the delay is referred to as primary amenorrhea. |
 | | See also puberty, delayed puberty, precocious puberty, thelarche, adrenarche, pubarche, gonadarche, menstrual cycle. |
| www.dogluvers.com /dog_breeds/Menarche (235 words) |
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