collagen diseases in pregnancy

例句：

1. 1. The condition is characterized by joint pain and stiffness during pregnancy.
   这种病症在怀孕期间表现为关节疼痛和僵硬。
2. 2.Researchers have identified several genes associated with the development of collagen diseases in pregnancy.
   研究人员已经确定了几种与妊娠中胶原蛋白疾病发展相关的基因。
3. 3. Early detection and treatment of collagen diseases in pregnancy can significantly improve the health outcomes for both mother and child.
   早期检测和治疗妊娠中的胶原蛋白疾病可以显著改善母亲和孩子的健康结果。