Abortion, Spontaneous 1 Adult 1 Case-Control Studies 1 Cotinine 1 Cross-Sectional Studies 1 Environmental tobacco smoke 1 Female 1 Humans 1 Hydrocortisone 1 Malaysia 1 Miscarriage 1 Pregnancy 1 Pregnancy Trimester, Third 1 Premature Birth 1 Preterm births Questionnaires 1 Risk Factors 1 Saliva 1 Statistics, Nonparametric 1 Stress 1 Stress, Psychological 1 Tobacco Smoke Pollution 1 Young Adult 1 adult 1 article 1 controlled study 1 cotinine 1 cross-sectional study 1 disease association 1 environmental exposure 1