She decided to study midwifery to help women have safe deliveries.

midwifery 是由 midwife（助产士）加上后缀 -ery 构成的名词。midwife 本身由 mid（古英语，意为"与...一起"）和 wife（古英语，意为"女人"）组成，字面意思是"与产妇在一起的女人"。后缀 -ery 表示"相关行业或技能"，所以 midwifery 指"助产学"或"助产术"。