Biomaterial Database

Significance of biparietal diameter differences between twins. 1978

A F Haney, and M C Crenshaw, and P J Dempsey

Twins of dissimilar size have increased risks both at delivery and in the neonatal period. When dissimilar growth is severe, it should be reflected in birthweight and biparietal diameter (BPD) growth. Sonograms were done on 74 of 106 sets of twins delivered from July 1, 1973, to June 30, 1977. Excluding prematurity and birth trauma, the difference in BPD between twins with normal outcomes in the last scan prior to delivery was 1.32 +/- 0.20 mm (mean +/- SE) and the difference in birthweight was 250.3 +/- 31.4 g (mean +/- SE). In 7 sets of twins with poor outcomes (intrauterine fetal demise or severe intrauterine growth retardation) without central nervous system anomalies the difference in BPD between twins in the last scan, while both fetuses were alive, was 6.86 +/- 1.06 mm (mean +/- SE) and the difference in birthweight was 604.3 +/- 217.2 g (mean +/- SE). Both the BPDs and birthweights are significantly different at the P less than 0.01 level. Large differences in BPD between twins may possibly indicate compromise of one twin.

UI	MeSH Term	Description	Entries
D007231	Infant, Newborn	An infant during the first 28 days after birth.	Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D010294	Parietal Bone	One of a pair of irregularly shaped quadrilateral bones situated between the FRONTAL BONE and OCCIPITAL BONE, which together form the sides of the CRANIUM.	Bone, Parietal,Bones, Parietal,Parietal Bones
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D011272	Pregnancy, Multiple	The condition of carrying two or more FETUSES simultaneously.	Multiple Pregnancy,Multiple Pregnancies,Pregnancies, Multiple
D005260	Female		Females
D005313	Fetal Death	Death of the developing young in utero. BIRTH of a dead FETUS is STILLBIRTH.	Fetal Mummification,Fetal Demise,Death, Fetal,Deaths, Fetal,Demise, Fetal,Fetal Deaths,Mummification, Fetal
D005317	Fetal Growth Retardation	Failure of a FETUS to attain expected GROWTH.	Growth Retardation, Intrauterine,Intrauterine Growth Retardation,Fetal Growth Restriction,Intrauterine Growth Restriction
D005333	Fetus	The unborn young of a viviparous mammal, in the postembryonic period, after the major structures have been outlined. In humans, the unborn young from the end of the eighth week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN.	Fetal Structures,Fetal Tissue,Fetuses,Mummified Fetus,Retained Fetus,Fetal Structure,Fetal Tissues,Fetus, Mummified,Fetus, Retained,Structure, Fetal,Structures, Fetal,Tissue, Fetal,Tissues, Fetal
D006128	Growth	Gradual increase in the number, the size, and the complexity of cells of an individual. Growth generally results in increase in ORGAN WEIGHT; BODY WEIGHT; and BODY HEIGHT.
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man