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

Favorito LA, Bernardo FO, Costa SF, Sampaio FJ - Int Braz J Urol (2016 May-Jun)

Bottom Line: Means were statistically compared using simple linear regression and the paired T-test.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.

View Article: PubMed Central - PubMed

Affiliation: Unidade de Pesquisa Urogenital, Universidade Estadual do Rio de Janeiro, RJ, Brasil.

ABSTRACT

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.

No MeSH data available.


Related in: MedlinePlus

Measurement of the distance between the lower pole of the kidney and the upper extremity of the testis. A) Male fetus with 22 weeks post-conception. The abdominal wall and the intra-peritoneal organs were removed, revealing the left kidney (LK) and the left testis (LT). B=bladder. B) The same fetus, where the distance between the lower pole of the left kidney (LK) and the upper extremity of the left testis (LT) was measured with a digital pachymeter (P).
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f02: Measurement of the distance between the lower pole of the kidney and the upper extremity of the testis. A) Male fetus with 22 weeks post-conception. The abdominal wall and the intra-peritoneal organs were removed, revealing the left kidney (LK) and the left testis (LT). B=bladder. B) The same fetus, where the distance between the lower pole of the left kidney (LK) and the upper extremity of the left testis (LT) was measured with a digital pachymeter (P).

Mentions: The linear regression analysis indicated that DK-T in the right and left sides correlated significantly and positively with fetal age and weight, during the fetal period studied (13 to 23 WPC). When comparing the DK-T with TL and CRL, we observed a weak correlation in the right and in the left side. Figure-2 shows the correlations graphs, the linear regression values (r2) and the p-values of all fetal parameters studied.


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

Favorito LA, Bernardo FO, Costa SF, Sampaio FJ - Int Braz J Urol (2016 May-Jun)

Measurement of the distance between the lower pole of the kidney and the upper extremity of the testis. A) Male fetus with 22 weeks post-conception. The abdominal wall and the intra-peritoneal organs were removed, revealing the left kidney (LK) and the left testis (LT). B=bladder. B) The same fetus, where the distance between the lower pole of the left kidney (LK) and the upper extremity of the left testis (LT) was measured with a digital pachymeter (P).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4920575&req=5

f02: Measurement of the distance between the lower pole of the kidney and the upper extremity of the testis. A) Male fetus with 22 weeks post-conception. The abdominal wall and the intra-peritoneal organs were removed, revealing the left kidney (LK) and the left testis (LT). B=bladder. B) The same fetus, where the distance between the lower pole of the left kidney (LK) and the upper extremity of the left testis (LT) was measured with a digital pachymeter (P).
Mentions: The linear regression analysis indicated that DK-T in the right and left sides correlated significantly and positively with fetal age and weight, during the fetal period studied (13 to 23 WPC). When comparing the DK-T with TL and CRL, we observed a weak correlation in the right and in the left side. Figure-2 shows the correlations graphs, the linear regression values (r2) and the p-values of all fetal parameters studied.

Bottom Line: Means were statistically compared using simple linear regression and the paired T-test.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.

View Article: PubMed Central - PubMed

Affiliation: Unidade de Pesquisa Urogenital, Universidade Estadual do Rio de Janeiro, RJ, Brasil.

ABSTRACT

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.

No MeSH data available.


Related in: MedlinePlus