Background & Aim: Postpartum depression is mood disorder that affected 10-15% of women during 6 months after delivery. This study was designed to investigate preventive effect of supportive activities during prenatal on postpartum depression.

Methods & Materials: This research is clinical trial study and the samples were 440 pregnant women in Lahijan and Astanea in eastern of Gilan .The sampling was simple randomization for 2 groups. One group presented in education classes and others received current prenatal care. Between 4 to 8 weeks after delivery their Beck depression inventory (BDI) score was evaluated among two groups. Data analysis has been done by SPSS statistical software.

Results: Prevalence depression (cases who have Beck score more than 16) in study group was 6.5% versus 18.6% in control group. Mean BDI score in study group was 7.08 versus 8.69.

Conclusion: Participated to education classes during pregnancy decrease the postpartum depression.

Background & Aim: It is important to identify modifiable causes of preterm delivery and low birth weight which are strong predictors of infants&apos later health status and survival. Research findings show that there are less low birth weight and preterm labors in the communities that have high intake of sea food. Consumption of Sea foods rich in w3 fatty acid can increase birth weight by prolonging gestation and reduce the risk of occurrence of preterm delivery.

Methods & Materials: In this prospective cohort study, samples (n=1200) were selected among pregnant women with different pattern of seafood intake at 16^th week of pregnancy receiving routine antenatal care in Gilan prenatal clinics. Subjects were selected by random sampling method. Women who had risk factors for preterm delivery or fish allergy were excluded. During 2004-2005 the pregnant women were visited monthly to determine their dietary habits (seafood intake). Infants&apos weight and mothers&apos gestational age were determined at the time of delivery. Data were collected by means of a validated self-determined questionnaire and a check- list.  Statistical analysis was carried out using SPSS statistical software package.

Results: Results showed that the per cent of term delivery (more than 37 gestational weeks) in women with more than 3 times, 1-3 times, and less than once sea food intake in a day is respectively 94.5%, 91%, and 91.5%. Moreover, birth weights more than 3000 gram in the neonates of these women were respectively 75.7%, 74.7%, and 71.2%. There was significant relationship between more than 3 times consumption of sea food in a month with gestational age (P<0.001) and birth weight (P<0.05).

Conclusion: Sea food consumption is effective in decreasing preterm delivery and low birth weight. Related nutritional educational programs for pregnant women are recommended.