Other historical factors related to ectopic pregnancies include prior tubal manipulation, pelvic inflammatory disease, previous ectopic pregnancy, tubal disease, use of an intrauterine device for contraception, fertility therapies, and tubal ligation.Upon physical examination, one may find an enlarged uterus after bimanual examination, breast changes, and softening and enlargement of the cervix (Hegar sign; observed at approximately 6 wk).
About 213 million pregnancies occurred in 2012, of which, 190 million were in the developing world and 23 million were in the developed world.
Preventing preterm birth and neonatal mortality: exploring the epidemiology, causes, and interventions. 2010;34(6):408-415Pub Med Article Mc Donald SD, Han Z, Mulla S, Beyene J. Overweight and obesity in mothers and risk of preterm birth and low birth weight infants: systematic review and meta-analyses. 2010;341:c3428Pub Med Article Nohr EA, Bech BH, Vaeth M, Rasmussen KM, Henriksen TB, Olsen J.
Obesity, gestational weight gain and preterm birth: a study within the Danish National Birth Cohort. 2007;21(1):5-14Pub Med Article Raisanen S, Gissler M, Saari J, Kramer M, Heinonen S.
B, Absolute risks attributable to body mass index (BMI) were estimated from ORs in the complete case analysis.
Y-axis scale shown in blue indicates range from 0% to 0.5%..