It is important to know how many weeks pregnant you are (pregnancy gestation). The first day of your last menstrual period is used to estimate how many weeks pregnant you are. For example, if it has been four weeks from the first day of your last period the pregnancy is at 4 weeks gestation. The most accurate way to know how pregnant you are is to have an ultrasound.
拨打妊娠选择帮助热线 1800 008 463 来了解您可以在哪里进行妊娠试验或超声波检查。