+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Differences in twins the importance of birth order

, : Differences in twins the importance of birth order. American Journal of Obstetrics & Gynecology 151(7): 915-921

Despite the clinical impression that 1st-born twins do better than 2nd-born twins, recent reports have shown no difference in perinatal mortality between them. To evaluate differences in twins, more sensitive means than perinatal deaths are necessary. This study examines differences between 80 1st-born and 2nd-born twin pairs with respect to Apgar score, umbilical venous and arterial blood gas, and acid-base data. The umbilical venous and arterial blood PO2 [partial pressure of O2], PCO2 [partial pressure of CO2], base deficit, pH and lactic acid concentration were measured in paired samples and compared with the paired t test and .chi.2 when applicable. Statistically significant differences favoring twin A, the 1st-born, were found in 1 min Apgar score, umbilical venous pH, PO2 and PCO2, and umbilical arterial PO2. The factors in umbilical venous and arterial blood did not show statistically significant differences. When these parameters were examined with respect to route of delivery, monochorionic and dichorionic twins, interval between twins and vertex twins only, with the possible effects of malpresentation eliminated, the results persistently favored the 1st-born twin. It is unequivocally demonstrated that there are substantial differences at birth favoring the 1st twin, despite similar perinatal mortality for both. Apparently, the 2nd-born twin has potentially greater susceptibility to hypoxia and trauma.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 005151707

PMID: 3920911

DOI: 10.1016/0002-9378(85)90670-2

Download PDF Full Text: Differences in twins the importance of birth order

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Tindberg, Y.; Blennow, M.; Granström, M., 1999: Clinical symptoms and social factors in a cohort of children spontaneously clearing Helicobacter pylori infection. In a cohort study of 305 Swedish children, repeated blood samples and structured questionnaires were obtained from 6 mo to 11 y of age. Of the 40 children seropositive for Helicobacter pylori in one or more samples, 32 (80%) had cleared the infect...

Hosen, H., 1969: Treatment of animal dander. Annals of Allergy 27(3): 136-137

Dumur, V.; Dautrevaux, M.; Han, K., 1976: The covalent structure of dog myoglobin. The primary structure of the myoglobin of the domestic dog (German shepherd) was studied. Tryptic and thermolytic peptides were compared with the sequence of other known myoglobins; the stepwise automatic Edman's degradation of the whole glob...

Mirakhur R.K.; Ferres C.J.; Clarke R.S.J.; Bali I.M.; Dundee J.W., 1983: Clinical evaluation of org nc 45 vecuronium bromide. Org NC 45, a new nondepolarizing neuromuscular blocking drug, was evaluated in 200 adult patients. The drug was administered in doses of 0.1, 0.15 or 0.2 mg/kg. Intubation could be satisfactorily carried out at .apprx. 90 s in 90% of patients. The...

Maruyama Y., 1989: Age differences of platelet aggregation plasma levels of prostanoid cyclic nucleotide and lipid in japanese. Platelet aggregation induced by adenosine diphosphate (ADP), adrenaline and collagen was studied in various age groups of healthy Japanese. Plasma levels of prostanoid, cyclic nucleotide and lipid (triglyceride and cholesterol) were investigated....

Sandell, J.; Sati, T.R.; Mehrotra, S.K.; Singh, L.D.; Bhatnagar, K.L., 1987: A study of the spectrum of cancer lesions in some areas of Eastern U. P. Indian Journal of Cancer 24(3): 146-149

Buyukuysal, R.L.; Ulus, I.H.; Aydin, S.; Kiran, B.K., 1995: 3,4-Diaminopyridine and choline increase in vivo acetylcholine release in rat striatum. We investigated the effects of choline, 3,4-diaminopyridine and their combination on acetylcholine release from the corpus striatum of freely moving rats which were treated or not with atropine. Intraperitoneal administration of choline or intrast...

Mitchell Richard Scott, 1985: Who's who in mineral names; Frank Collins Tinsley (1916). Rocks and Minerals 60(5): 232-233

Anonymous, 1999: Index to volume 10. Cytokine 10(12): I-Xi

Verma, A.K.; Levine, M.; Shalansky, S.J.; Carter, C.J.; Kelton, J.G., 2003: Frequency of heparin-induced thrombocytopenia in critical care patients. The diagnosis of heparin-induced thrombocytopenia (HIT) in critically ill patients is complicated by lack of information on the frequency of HIT relative to thrombocytopenia from other causes. In addition, results from HIT diagnostic tests have no...