The position of the testis during the fetal period: an additional parameter to estimate fetal weight

Favorito, Luciano A.; Costa, Waldemar S.; Sampaio, Francisco J.B.

doi:10.1590/s1677-55382010000500011

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Studies correlating fetal parameters with testicular migration during human fetal period are rare in literature. A previous study of fetal weight and testicular descent in human fetuses showed that almost 7% of the testes in fetuses with weight up to 500g had the testes positioned in the inguinal canal ( 26 ). In our sample, we observed that the distance between the kidney and the testis was greater in fetuses weighing more than 350g.…”

Section: Discussionmentioning

confidence: 99%

Is there a trans-abdominal testicular descent during the second gestational trimester? Study in human fetuses between 13 and 23 weeks post conception

et al. 2016

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Objectives To confirm if a real inner descend of testis occurs, correlating the testicular position with fetal parameters and analyzing the position of the testes relative to the internal ring.Material and Methods Twenty nine human fetuses between 13 and 23 weeks post conception (WPC) were studied. The fetuses were carefully dissected with the aid of a stereoscopic lens with 16/25X magnification and testicular position observed. With the aid of a digital pachymeter the distance between the lower pole of the kidney and the upper extremity of the testis (DK-T) was measured to show the position of the testis. During the dissection we also indicated the position of the testes relative to the internal ring. Means were statistically compared using simple linear regression and the paired T-test.Results The 58 testes had abdominal position. The DK-T in the right side measured between 0.17 and 1.82cm (mean=0.79cm) and in the left side it was between 0.12 and 1.84cm (mean=0.87cm), without statistically differences (p=0.0557). The linear regression analysis indicated that DK-T in both sides correlated significantly and positively with fetal age. All fetuses with more than 20 WPC, heavier than 350g and with CRL over 22cm had a greater distance than the average DK-T. We xobserved that the 58 testis remains adjacent to the internal ring throughout the period studied.Conclusions The testes remains adjacent to the internal ring throughout the period studied, indicating that there is no real trans-abdominal testicular descent during the second gestational trimester.

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Section: Discussionmentioning

confidence: 99%

Is there a trans-abdominal testicular descent during the second gestational trimester? Study in human fetuses between 13 and 23 weeks post conception

et al. 2016

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Inguinoscrotal stage of testicular descent: analysis in 217 human fetuses

Benzi

Costa

Sampaio

et al. 2020

Journal of Pediatric Urology

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Unraveling Human Fetal Testicular Descent: Morphometric and Microscopic Analysis across Gestational Ages

Ramamoorthy,

Latiff,

Subramanian

et al. 2024

National Journal of Clinical Anatomy

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Background: Testicular descent is a complex process that begins during fetal development and culminates after birth. This study aimed to investigate the fetal testicular descent and development during the gestational period. Methodology: We performed a retrospective analysis of 29 fetuses, ranging from 12 to 40 weeks of gestation. The testicular migration was observed by dissection and the morphometry, location, and histology of the testes were analyzed. Statistical analysis using Kolmogorov–Smirnov and Shapiro–Wilks test was performed to check the normality. To compare the right and left sides, Mann–Whitney U-test was used. Results: Testis developed in the posterior abdominal wall in 9-12 week of fetal gestational age. The same was found in the inguinal canal in the higher age fetuses. Our study found that the weight of the testis was proportional to the gestational age of the fetus. The location of the testis on both the sides was similar at each gestational age studied. The diameter of the seminiferous tubules was narrow and highly coiled between 24 and 32 weeks. Whereas, broader seminiferous tubules were observed in the fetuses of the third trimester of gestation. Furthermore, the tunica albuginea thickness was found to be increase in the fetuses between 20 and 24 weeks of gestation. In full-term fetuses, the testis was observed in the scrotum. Conclusion: This study emphasizes certain nuances and developmental patterns noted during fetal testicular descent. It also provides insights into the fetal testicular descent and development revealed through morphometric and microscopic investigations.

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The position of the testis during the fetal period: an additional parameter to estimate fetal weight

Cited by 3 publications

References 19 publications

Is there a trans-abdominal testicular descent during the second gestational trimester? Study in human fetuses between 13 and 23 weeks post conception

Is there a trans-abdominal testicular descent during the second gestational trimester? Study in human fetuses between 13 and 23 weeks post conception

Inguinoscrotal stage of testicular descent: analysis in 217 human fetuses

Unraveling Human Fetal Testicular Descent: Morphometric and Microscopic Analysis across Gestational Ages

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