The original poster is correct: human gestation is about 10 months (from conception). Most women would be aware of their pregnancy for only nine of those months.
Human gestation is estimated as 40 weeks counting from the last menstruation. Conception is 2 weeks after that on average, so the actual time is about 38 * 7 = 266 days.
Dividing by 30, you get 266 / 30 = 8,866666666667 months (almost nine).
Dividing by 30, you get 266 / 30 = 8,866666666667 months (almost nine).