A study published in BMC Medicine reveals an association between smoking habits and BMI values and increased time to conception and lower age during the first delivery.
The study used data from 84,705 Norwegian mother, father and child participants, 68,002 of whom were female. It looked at various lifestyle choices, including caffeine and alcohol intake, smoking and body mass index (BMI) with fertility outcomes.
The data showed the most consistent associations between elevated BMI values and increased time to conception, the need for infertility therapy and the chances of miscarriage. In addition, the time to conception was higher among smokers. It also linked the effects of smoking and elevated BMI on lower age at first delivery, as well as elevated BMI on longer time for conception.