Background: Studies have shown that implementing the Ten Steps to Successful Breastfeeding of the Baby-Friendly Hospital Initiative can protect, promote, and support breastfeeding. However, few studies have valuated the quality of breastfeeding supportive services provided by Baby-Friendly Hospitals from the perspective of service users. Methods: This was a hospital-based prospective study, conducted at eight Baby-Friendly Hospitals with a total of 707 pregnant women in Shanghai, China between October 2016 and September 2021. Breastfeeding supportive services during hospitalization were assessed at childbirth discharge using a 12-question questionnaire based on the Chinese “Baby-Friendly Hospital Evaluation Standards”. Women were followed up on six months postpartum. The impact of breastfeeding supportive services during hospitalization on the exclusive breastfeeding at discharge and six months postpartum were assessed. Results: Of the 707 mothers who completed the survey at discharge, 526 were followed up on six months after delivery. The overall exclusive breastfeeding rate among participants was 34.4% at discharge and 52.1% at six months postpartum. Mothers who received better breastfeeding supportive services during hospitalization were more likely to practice exclusive breastfeeding at hospitalization discharge compared with mothers who received poorer services (aOR: 3.00; 95% CI: 2.08, 4.35; p < 0.001). Furthermore, they were also more likely to exclusively breastfeed at six months postpartum (aOR: 1.50; 95% CI: 1.03, 2.22; p = 0.033). Conclusion: Better breastfeeding supportive services during hospitalization were significantly associated with higher rate of exclusive breastfeeding at discharge and six months postpartum. More effective measures should be adopted to improve the implementation of the breastfeeding supportive services in Baby-Friendly Hospitals to promote exclusive breastfeeding and better maternal and child health.

Background: The role of vitamin D in reproductive health is still unclear. This study aimed to assess the effect of serum 25-hydroxyvitamin D (25(OH)D), among preconception couples, on fecundity, and the associations between 25(OH)D concentrations before and during pregnancy, and pregnancy outcomes. Methods: 200 preconception couples attempting to conceive were recruited and were followed-up until childbirth. Time to pregnancy was collected via telephone every two months or obtained via a questionnaire during pregnancy. Blood samples were collected to measure serum 25(OH)D levels from both partners at enrollment and from women during the second and third trimester of pregnancy. Results: Couples had higher conception rates within six months (adjusted odds ratio (aOR): 3.72, 95% CI: 1.16, 11.9) and reduced time to pregnancy (adjusted fecundability ratio (aFR): 1.50, 95% CI: 1.01, 2.23) if male partners had sufficient 25(OH)D compared with insufficient 25(OH)D. Compared to pregnant women with insufficient 25(OH)D in the third trimester of pregnancy, sufficient 25(OH)D was associated with reduced odds of anemia (OR: 0.22, 95% CI: 0.06, 0.82), longer gestational age (β: 0.53, 95% CI: 0.04, 1.01) and newborns’ higher ponderal index (β: 0.10, 95% CI: 0.01, 0.19). Conclusions: Sufficient serum 25(OH)D levels among preconception men or during pregnancy were associated with better reproductive health.