viviparity

例句：

1. 1. The couple has a high viviparity, which is beneficial for their offspring.
   这对夫妇生育力旺盛，这对他们的后代是有益的。
2. 2.The researcher found that the higher the viviparity, the more likely it was to lead to a healthy child.
   研究者发现，生育力越旺盛，孩子越有可能健康。
3. 3. The woman's viviparity had a significant impact on her family's future generations.
   这位妇女的生育力对她们家庭的未来世代产生了重大影响。