Size and location of the fetal human ovary.

OBJECTIVE: To determine the development and the localization of the ovaries during the fetal period. MATERIAL AND METHODS: One hundred and fifty-four ovaries obtained from 77 human fetuses aged between 9 and 40 weeks of gestation were used in this study. Firstly, the shapes and the positions of the ovaries were established. Second, the localization of the ovaries with respect to linea terminalis, ureters, and the iliac arteries were determined. Finally, the dimensions and the weight of the ovaries were measured. FINDINGS: In the fetal period, the ovaries were most commonly almond shaped and had an oblique orientation. In the 1st trimester the midpoint of the long axis of the fetal ovaries were at the level of linea terminalis. In the 2nd and 3rd trimester and full-term fetuses, it was observed that the ovaries were not in ovarian fossa, suggesting that descensus ovary was in progression during these times. During the intrauterine period, the ovaries were most commonly located anterior to the ureters and over the common iliac artery, only to migrate to its final location between the internal and external iliac arteries towards the end of the 40th week. CONCLUSION: We found that the ovaries did not assume the position of the adults at the end of the fetal period, rather continued its descent after the birth. We believe our findings about the fetal ovaries will be useful in obstetrics, fetal pathology, and forensic pathology.

Uterine tube-ovary relationship and fimbrial development during the fetal period.

OBJECTIVE: We aimed to evaluate the position, localization and development of the uterine tubes and their relationships to the ovaries. METHODS: One hundred and fifty-four uterine tubes and ovaries taken from 77 human fetuses aged between 9-40 weeks of gestation have been included in this study. The study was performed in Department of Anatomy of Suleyman Demirel University Faculty of Medicine, Isparta, Turkey in 2004. The position and localization of the uterine tubes have been determined. Consequently, uterine tube - ovary relationship and fimbrial development has been investigated. RESULTS: It has been observed that the uterine tubes are transversely and obliquely positioned. The most commonly observed position was transverse position. When the relationship between the uterine tubes and ovaries was explored, it was observed that the ovaries were localized in the superior, anterior or posterior aspect of the uterine tubes. In addition, when relationship between the obliquely positioned uterine tubes and ovaries was assessed, we found that the ovaries are located at the middle, anterior, lateral or posterior of uterine tubes. Furthermore, it indicates that the fimbrial development begins only after the 20th week and the quantity of fimbriae increased by gestational age. CONCLUSION: We conclude that the uterine tubes are not positioned as in adults during the fetal period, some variants can be seen in the uterine tube - ovary relationship and fimbrial development begins after the 20th week of gestational age and continued after birth.