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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

Correlation of the distance between the lower pole of the kidney and the upper extremity of the testis (DK-T) in the left and right side with fetal age, total fetal length, crown-rump length and weight during the fetal period studied (13 to 23 weeks post-conception-WPC). The points plotted represent the mean values obtained for each week studied. A) AGE (WPC). Linear regression indicated that DK-T is correlated significantly and positively with fetal age (right side: r2 = 0.4128, p=0.0002 and left side: r2 = 0.4452, p<0.0001). B) Fetal weight (g). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2987, p=0.0022 and left side: r2 = 0.3094, p=0.0017). C) Crown-rump length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal crown-rump length (right side: r2 = 0.2235, p=0.0096 and left side: r2 = 0.2995, p=0.0021). D) Total length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2729, p=0.0036 and left side: r2 = 0.3324, p=0.0011).
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f01: Correlation of the distance between the lower pole of the kidney and the upper extremity of the testis (DK-T) in the left and right side with fetal age, total fetal length, crown-rump length and weight during the fetal period studied (13 to 23 weeks post-conception-WPC). The points plotted represent the mean values obtained for each week studied. A) AGE (WPC). Linear regression indicated that DK-T is correlated significantly and positively with fetal age (right side: r2 = 0.4128, p=0.0002 and left side: r2 = 0.4452, p<0.0001). B) Fetal weight (g). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2987, p=0.0022 and left side: r2 = 0.3094, p=0.0017). C) Crown-rump length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal crown-rump length (right side: r2 = 0.2235, p=0.0096 and left side: r2 = 0.2995, p=0.0021). D) Total length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2729, p=0.0036 and left side: r2 = 0.3324, p=0.0011).

Mentions: With the aid of a digital pachymeter, the distance between the lower pole of the kidney and the upper pole of the testis (DK-T) was measured to show the descent of the testis during migration. The same observer made these measurements (Figure-1). During the dissection we also indicated the position of the testes relative to the internal ring.


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)

Correlation of the distance between the lower pole of the kidney and the upper extremity of the testis (DK-T) in the left and right side with fetal age, total fetal length, crown-rump length and weight during the fetal period studied (13 to 23 weeks post-conception-WPC). The points plotted represent the mean values obtained for each week studied. A) AGE (WPC). Linear regression indicated that DK-T is correlated significantly and positively with fetal age (right side: r2 = 0.4128, p=0.0002 and left side: r2 = 0.4452, p<0.0001). B) Fetal weight (g). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2987, p=0.0022 and left side: r2 = 0.3094, p=0.0017). C) Crown-rump length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal crown-rump length (right side: r2 = 0.2235, p=0.0096 and left side: r2 = 0.2995, p=0.0021). D) Total length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2729, p=0.0036 and left side: r2 = 0.3324, p=0.0011).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f01: Correlation of the distance between the lower pole of the kidney and the upper extremity of the testis (DK-T) in the left and right side with fetal age, total fetal length, crown-rump length and weight during the fetal period studied (13 to 23 weeks post-conception-WPC). The points plotted represent the mean values obtained for each week studied. A) AGE (WPC). Linear regression indicated that DK-T is correlated significantly and positively with fetal age (right side: r2 = 0.4128, p=0.0002 and left side: r2 = 0.4452, p<0.0001). B) Fetal weight (g). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2987, p=0.0022 and left side: r2 = 0.3094, p=0.0017). C) Crown-rump length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal crown-rump length (right side: r2 = 0.2235, p=0.0096 and left side: r2 = 0.2995, p=0.0021). D) Total length (cm). Linear regression indicated that DK-T is correlated significantly and positively with fetal weight (right side: r2 = 0.2729, p=0.0036 and left side: r2 = 0.3324, p=0.0011).
Mentions: With the aid of a digital pachymeter, the distance between the lower pole of the kidney and the upper pole of the testis (DK-T) was measured to show the descent of the testis during migration. The same observer made these measurements (Figure-1). During the dissection we also indicated the position of the testes relative to the internal ring.

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