first-born

n.

头生，头胎；

1. He also struck down all the firstborn in their land, The first fruits of all their vigor.
   他又击杀他们国内一切的长子，就是他们强壮时头生的。
2. Our first baby was born by caesarean.
   我们的头胎婴儿是剖腹产的。
3. This time, unlike the first, the birth was an ordeal.
   与头胎不同，这次是难产。

First Born
First Born
First Born
High risk of HIV-1 infection for first-born twins. The International Registry of HIV-exposed Twins
Increased risk of ankylosing spondylitis among first‐born children: Comment on the article by Baudoin et al
STUDIES ON THE FAILURE OF THE FIRST BORN APPROXIMATION IN ELECTRON DIFFRACTION. I. URANIUM HEXAFLUORIDE
High risk of HIV-1 infection for first-born twins
The arrival of sibling: changes in patterns of interaction between mother and first-born child
Birth order and ankylosing spondylitis: no increased risk of developing ankylosing spondylitis among first-born children.
Validity of diffraction tomography based on the first born and the first rytov approximations.
THE REACTION OF FIRST-BORN CHILDREN TO THE BIRTH OF A SIBLING: MOTHERS' REPORTS
Infant Feeding and Mental and Motor Development at 18 Months of Age in First Born Singletons
Preterm Delivery and Low Birth Weight among First-Born Infants of Black and White College Graduates