COVID-19 Is Becoming A '9/11 Moment' For Borders And Health.

The COVID-19 pandemic has had a dramatic impact on the cross-border movement of people. As governments begin to reopen their borders and cautiously restart travel, their attention is shifting to border procedures that could facilitate travel while protecting the homeland from travelers who may be infected. This is not the first time in recent memory that border management has had to be rethought under the pressure of large external forces.

The influence of fetal sex in screening for trisomy 21 by fetal nuchal translucency, maternal serum free beta-hCG and PAPP-A at 10-14 weeks of gestation.

In a study of 2923 normal pregnancies and 203 pregnancies affected by trisomy 21 we have shown a significant difference in the median MoM of the markers: fetal nuchal translucency, maternal serum free beta-hCG and PAPP-A in the presence of a female fetus compared with a male fetus. For maternal serum free beta-hCG levels are higher by 15% if the fetus is chromosomally normal and by 11% if the fetus has trisomy 21. For maternal serum PAPP-A the levels in chromosomally normal fetuses are 10% higher in the presence of a female fetus and 13% higher if the fetus has trisomy 21.

[The effects of international migration on the receiving countries, the countries of origin, and immigrants].

"This article points out that the societies who lack labour force and those who have a surplus, share common interests which may lead to organised or spontaneous migratory flows. Today, emigration is incapable of correcting the weaknesses of the socioeconomic structures of the host societies or of being a means of developing the societies of origin. The latter have in reality only benefited from 'passive' gains.