Related by context. Frequent words. (Click for all words.) 72 preterm births 71 preterm delivery 69 neural tube defect 69 preterm 67 congenital anomalies 67 low birthweight babies 67 preterm birth 67 congenital abnormalities 66 preterm babies 66 congenital malformations 65 preterm infants 65 weeks gestation 65 low birthweight 64 birthweight 63 vaginal deliveries 63 postoperative complications 63 stillbirth 63 neonatal mortality 63 cesarean delivery 62 premature births 62 Preterm birth 62 preeclampsia 62 fetal distress 62 chromosomal abnormalities 61 folic acid supplementation 61 polycystic ovary syndrome 61 neural tube defects 61 uterine rupture 61 spontaneous abortions 61 glucose intolerance 60 premature birth 60 metabolic abnormalities 60 gestational age 60 thrombotic events 60 premenopausal 60 fetal abnormalities 60 pregnancies 60 BRCA2 mutations 59 stillbirths 59 asthma exacerbations 59 pelvic inflammatory disease 59 trisomy 59 pre eclampsia 59 aneuploidy 59 menarche 59 ectopic pregnancies 59 vaginal births 59 comorbid conditions 59 anencephaly 59 amenorrhea 59 neonates 59 thromboembolism 58 Caesarean delivery 58 invasive pneumococcal disease 58 preterm labor 58 prenatally 58 perinatal 58 serum concentrations 58 bronchiolitis 58 myocardial infarctions 58 seroconversion 58 eclampsia 58 postmenopausal breast cancer 57 LQTS 57 febrile seizures 57 depressive symptoms 57 Premature birth 57 endometrial cancer 57 prematurity 57 Obstructive sleep apnea 57 RSV infection 57 neurodevelopmental disorders 57 chromosomal abnormality 57 Pregnancies 57 potential confounders 57 preemies 56 recurrent infections 56 gestational diabetes 56 cardiorespiratory fitness 56 Postpartum depression 56 colorectal polyps 56 maternal fetal 56 Multiple births 56 caesareans 56 intrauterine 56 myocardial infarction MI 56 vertebral fracture 56 thromboembolic events 56 urinary symptoms 56 venous thrombosis 56 obese adolescents 56 genetic abnormalities 56 neurological complications 56 cesarean sections 56 neurodevelopmental 55 neonatal 55 malformations 55 tumor recurrence 55 Prematurity 55 neurodevelopment 55 gestational