We then compared mean gestational age and the risk of preterm delivery between twin pair types (boy-boy, boy-girl and girl-girl) (Table2). Compared to boy-boy pairs, mean gestational age was greater in both boy-girl [0.13 weeks; 95% CI 0.06 to 0.21 (p = 0.001)] and girl-girl...
Human evolution - Brain Size, Adaptations, Fossils: Because more complete fossil heads than hands are available, it is easier to model increased brain size in parallel with the rich record of artifacts from the Paleolithic Period (c. 3.3 million to 10,00
Based on SizeUSA, a national dataset, women were classified into each size category based on their bust, waist and hip measurements, and their measurements were compared to American Society of Testing and Materials (ASTM) standards. Results showed a significant difference for most size categories....
Sex ratios in all areas were male-biased and the male-to-female ratio was significantly higher in the upstream segment of the river (2.2:1) compared to the area of first introduction (1.4:1). The difference between the newly invaded and the established sites suggests that round goby ...
In that case, n = m — 1, and individual network size would be inextricably tied to group size. But, at least in the case of human primates, interaction fi-equencies are certainly not transitive (Freeman 1992b). Humans do display some tendency to strain toward transitivity in 展开 ...
Oestradiol and progesterone profiles from naturally occurring conception and exposed non-conception cycles were compared to assess the impact of natural va... Lipson S.F.,Ellison P.T. - 《Human Reproduction》 被引量: 292发表: 1996年 The relative importance of size and asymmetry in sexual selecti...
compared to the female brain volume of 70.8±0.72 cm 3. The average area of the corpus callosum increased from 8 months to 4.5 years; 0.56 to 0.93 cm 2 in males and 0.45 to 0.66 cm 2 in females. However, the average area of splenium is significantly greater in females (0.280 cm 2)...
Neither boys nor girls think the opposite sex should change size to be an ideal size. Girls chose a smaller ideal size for themselves as compared to other girls. Girls' perceived ideal size for themselves was smaller than what boys rated as ideal for girls.There were no significant ethnic ...
Hand size perceptual distortions characterize adult human cognition. Notwithstanding the importance of uncovering how hand size representation develops in humans, studies in this field are still at a preliminary stage. Indeed, it is yet to be understood
Moreover, males (but not females) from the S lines exhibited significantly higher treadmill (<(V)over dot >)o(2)max as compared to those from C lines. The sex-specific responses to selection may in part be consequences of sex differences in body mass and running style. Our results high...