The Effect Of Pregnant Mother's Factors On Neonatal Bone Mineral Density

Objective:to investigate the newborn's BMD and the influencing factors of their pregnant mothers in Kunming.Method:Bone mineral density of left midshaft of 126 neonates, whose age were between 0 and 28 days and gestational age were between 37 weeks and 42 weeks, were measured with Aonuo ultrasound bone sonometer. Then the surveys of their pregnant mothers' age, education background, living environment, average daily outdoor activities time, the condition of the intake of calcium or vitamin D, profession and the diseases when pregnancy had had been taken by means of questionnaire investigations or interviews.Result:1. we found that the group whose pregnant mothers' age were less than 20 years old, BMD in neonates was about 2843.25±110.52(m/s),the group of age between 20 and 30 years old BMD in neonates was 2800.47±119.93(m/s) and the group of age older than 30 years old BMD in neonates was 2809.20±110.61(m/s). Contrasting these three group's, p> 0.05, indicated that there was no significant difference of BMD in neonates when pregnancy age was different.2. we found that the pregnant mother group without calcium or vitamin D supplement, BMD in neonates was 2738.21±112.94(m/s), the pregnant mother group with erratically calcium or vitamin D supplement, BMD in neonates was 2772.72±53.03(m/s),and the pregnant mother group with regularly calcium or vitamin D supplement, BMD in neonates was 2862.19±121.90(m/s). Contrasting these three groups, p<0.05, indicated that there was significant difference of BMD in neonates when pregnant mothers' calcium or vitamin D supplement was different and the group with regularly calcium or vitamin D supplement, BMD in neonates was the highest. 3. we found that the urban group's BMD in neonates was 2814.87±129.08(m/s), and the country group's BMD in neonates was 2797.60±101.67(m/s). Contrasting these two grounps, p>0.05, indicated that there was no significant difference of BMD in neonates when pregnancy age was different.4. we found that the elementary education group's BMD in neonates was 2777.10±75.33(m/s), the secondary academic group's BMD in neonates was 2766.61±110.43(m/s), the high school degree group's BMD in neonates was 2782.62±91.20(m/s),and college graduate or above group's BMD value in neonates was 2858.52±127.64(m/s). Contrasting these four groups, p<0.05, indicated that there was significant difference of BMD in neonates when pregnant mothers'education background was different and college graduate or above group's BMD in neonates was the highest.5. we found that the group that the average daily outdoor activities time was below one hour, BMD in neonates was 2754.79±84.06 (m/s), the group that the average daily outdoor activities time was between one hour and two hours, BMD in neonates was 2778.48±99.23 (m/s),and the group that the average daily outdoor activities time was above two hours, BMD in neonates was 2841.72±125.14 (m/s). Contrasting these three groups, p<0.05, indicated that there was significant difference of BMD in neonates when pregnant mothers'average daily outdoor activities time was different and the group that the average daily outdoor activities time was above two hours, BMD in neonates was the highest.6. we found that the peasant group's BMD in neonates was 2810.08±131.90 (m/s), the workman group's BMD in neonates was 2811.70±92.50(m/s), and the group that the Profession was others, BMD in neonates was 2795.45±99.04(m/s). Contrasting these three groups, p>0.05, indicated that there was no significant difference of BMD in neonates when the Profession of the pregnant mother was different.7. we found that the healthy pregnant mother group's BMD in neonates was 2806.06±116.58 (m/s),the pregnant mother with pregnancy complication group's BMD in neonates was 2803.00±93.34(m/s). Contrasting these two groups, p>0.05, indicated that there was no significant difference of BMD in neonates when the health condition of the pregnant mother was different. Conclusions:l.No significant difference of BMD in neonates when pregnancy age was different2. The BMD in neonates was the highest when their pregnant mothers have an regularly intake of calcium or vitamin D everyday.3. No significant difference of BMD in neonates when the pregnancy mother's living environment was different;4. college graduate or above group's BMD in neonates was the highest.5. having a average two hours sunshine time everyday when got pregnany would do better to the BMD in neonates.6. no significant difference of BMD in neonates when the Profession of the pregnant mother was different.Above all, the effect of pregnant mother's factors on neonatal bone mineral densityin Kunming were the education background of the pregnant mothers, their average sunshine time everyday, and the intake condition of calcium during pregnancy.