Onyiriuka Alphonsus N
Department of Child Health, University of Benin Teaching Hospital, P.M.B 1111, Benin City, Nigeria.
Ann Afr Med. 2009 Apr-Jun;8(2):110-4. doi: 10.4103/1596-3519.56239.
Birthweight differences in twin pairs influence their perinatal outcome as well as growth and development. Growth-discordant twins have not been well characterized in our local environment.
To determine the frequency of birthweight discordance in live-born twin pairs and document some factors that may influence it.
In this cross-sectional study, 104 live-born twin pairs were recruited and their intrapair birthweight differences were determined. Twin pairs whose birthweight difference was 15% or more, using the larger infant as the growth standard, were designated as discordant. The maternal age, parity, and birth order of the heavier twin were noted.
The prevalence of birthweight discordance was 28.8% when a 15% cut-off point was used but dropped to 9.6% when a 25% cut-off point was applied. Grand multiparity was associated with a significantly increased risk of delivery of discordant twins. Same-sex twin pairs accounted for 60% of all cases of birthweight discordance.
Birthweight discordance is common in twin gestations in Benin City, especially among grand multiparous women.
双胞胎的出生体重差异会影响其围产期结局以及生长发育。在我们当地环境中，生长不一致的双胞胎尚未得到充分的特征描述。
确定活产双胞胎中出生体重不一致的频率，并记录一些可能影响它的因素。
在这项横断面研究中，招募了104对活产双胞胎，并确定了他们的双胞胎内出生体重差异。以较大婴儿作为生长标准，出生体重差异为15%或更多的双胞胎对被指定为不一致。记录较重双胞胎的母亲年龄、产次和出生顺序。
当采用15%的切点时，出生体重不一致的患病率为28.8%，但当采用25%的切点时，患病率降至9.6%。多产与分娩不一致双胞胎的风险显著增加相关。同性双胞胎对占所有出生体重不一致病例的60%。
出生体重不一致在贝宁城的双胎妊娠中很常见，尤其是在多产妇女中。
