Which notation documents a woman with three term pregnancies, one of which was a set of twins?

• A. G2P3004
• B. G3P3004
• C. G3P2104
• D. G3P3003

Answer: (B)

In obstetric history, GTPAL is used to summarize a woman’s pregnancies in terms of number of pregnancies, term births, preterm births, abortions, and living children. The key idea is that a twin birth counts as one pregnancy but adds an extra living child.

Here, the woman has had three pregnancies (gravida three). All three pregnancies reached term, there were no preterm deliveries, and there were no abortions. Because one of those pregnancies was twins, the total number of living children is four. So the notation that reflects three term births, zero preterm, zero abortions, and four living children is G3P3004. This encodes three pregnancies with a twin delivery, resulting in four living children. The pattern would not fit if term, preterm, or abortion counts didn’t match the three pregnancies or if living children didn’t equal four.