I'm a little confused- human or feline. If the former - consider she might have an imperforate hymen. A good gyno will be able to sort this. "Anatomic anomalies
Consider anatomic anomalies that can be confused with imperforate hymen in the differential diagnosis. These anomalies include the following:
* Acquired labial adhesions * Obstructing or partially obstructing vaginal septa (longitudinal or transverse) * Vaginal cyst * Vaginal agenesis (Mayer-Rokitansky-Kuster-Hauser syndrome) with or without the presence of a uterus or functional endometrium * Androgen insensitivity syndrome (testicular feminization)
Frequency
Imperforate hymen is likely the most frequent obstructive anomaly of the female genital tract, but estimates of its frequency vary from 1 case per 1000 population to 1 case per 10,000 population. Heger et al examined 147 premenarchal girls with a mean age of 63 months to collect normative data on genital anatomy; an imperforate hymen was found in only one patient (<1%) and hymenal septa were found in 3 (2%).1
Imperforate hymen usually occurs sporadically, but a handful of cases have been reported to be familial.
no subject
"Anatomic anomalies
Consider anatomic anomalies that can be confused with imperforate hymen in the differential diagnosis. These anomalies include the following:
* Acquired labial adhesions
* Obstructing or partially obstructing vaginal septa (longitudinal or transverse)
* Vaginal cyst
* Vaginal agenesis (Mayer-Rokitansky-Kuster-Hauser syndrome) with or without the presence of a uterus or functional endometrium
* Androgen insensitivity syndrome (testicular feminization)
Frequency
Imperforate hymen is likely the most frequent obstructive anomaly of the female genital tract, but estimates of its frequency vary from 1 case per 1000 population to 1 case per 10,000 population. Heger et al examined 147 premenarchal girls with a mean age of 63 months to collect normative data on genital anatomy; an imperforate hymen was found in only one patient (<1%) and hymenal septa were found in 3 (2%).1
Imperforate hymen usually occurs sporadically, but a handful of cases have been reported to be familial.
http://emedicine.medscape.com/article/269050-overview