The fetal lungs are capable of breathing after ( ). A: 20 weeks' gestational age B: 24 weeks' gestational age C: 28 weeks' gestational age D: 32 weeks' gestational age E: 16 weeks' gestational age

Gestational choriocarcinoma is a lowly invasive tumor.

Gestational choriocarcinoma is a highly invasive and frequently metastatic tumor.

Gestational diabetes is diabetes that develops or first occurs during pregnancy.

Which of the following are the risk factors of ROP? A: Low birth weight B: Low gestational age C: High oxygen therapy D: Comorbidities