The Relationship Between Pre-pregnancy BMI and Weight Gain and Outcomes in Women With Twin Pregnancy
The Relationship Between Pre-pregnancy BMI and Weight Gain and Outcomes in Women With Twin Pregnancy
Prepregnancy body mass index (BMI) and gestational weight gain (GWG) have Significant effects
 on the risk of pregnancy outcomes such as gestational hypertension disease and gestational
 diabetes mellitus in singleton pregnancies. This paper is to investigate the relationship
 between pre-pregnancy body mass index (BMI) and weight gain during pregnancy and pregnancy
 outcomes in women with twin pregnancy.
Inclusion Criteria:

 -  Age 18 ~ 41 years old;

 -  The gestational age of the first diagnosed twin pregnancy is ≤10weeks;

 -  Double chorionic double amniotic sac pregnancy;

 Exclusion Criteria:

 -  with heart disease, liver disease, kidney disease, complications (chronic
 hypertension, hyperthyroidism, diabetes and others ), genetic diseases, psychological
 and mental diseases;

 -  with history of habitual abortion and cervical insufficiency;