Results 61 to 70 of about 93,387 (264)

Twin pregnancies and the limits of the energetics of gestation and growth hypothesis

The Anatomical Record, EarlyView.
Abstract The “Energetics of Gestation and Growth” (EGG) hypothesis proposes that human birth timing and the associated secondary altriciality of human newborns is determined by limits in maternal metabolic capacity. According to this model, labor is triggered when the increasing fetal energy requirements exceed the expectant mother's maximum sustained ...
Cédric Cordey, Nicole M. Webb, Martin Haeusler   +2 more
wiley   +1 more source

Influential and prognostic factors of small for gestational age infants

Chinese Medical Journal, 2009
Background Small for gestational age (SGA) infants are associated with a high rate of oligohydramnios, stillbirth and cesarean delivery. Among SGA patients there is a higher risk of neonatal complications, such as polycythemia, hyperbilirubinemia, and hypothermia.
Yong-li, Zhang, Jun-tao, Liu, Jin-song, Gao, Jian-qiu, Yang, Xu-ming, Bian   +4 more
openaire   +2 more sources

The 9+ month marathon: How pregnancy may have shaped human endurance capacities

The Anatomical Record, EarlyView.
Abstract Anthropology has long considered the evolution of our uniquely human endurance capacities to be the result of selection upon anatomical and physiological features imposed by the demands of thermoregulation and resource acquisition, particularly during the demands of persistence hunting. Research has focused on the anatomical changes present in
Cara Ocobock
wiley   +1 more source

Umbilical cord serum metabolomics identifies amino acid alterations associated with impaired linear growth in small for gestational age infants

Scientific Reports
Small-for-gestational-age (SGA) infants exhibit considerable heterogeneity in growth trajectories and metabolic outcomes; however, the metabolic basis underlying these variations remains incompletely understood.
Masanori Inoue, Kazuhito Sekiguchi, Shintaro Kishimoto, Tomoki Maeda, Kenji Ihara   +4 more
doaj   +1 more source

The mechanism of labor in nonhuman primates: A look inside

The Anatomical Record, EarlyView.
Abstract While in humans, the flexed position of the fetus and its rotating course down the birth canal are well documented, in other primates the mechanism of labor is unknown. Despite the lack of comparative data, it is commonly assumed that the human obstetric mechanism is unique, and anthropologists have disputed when and why the transition to the ...
Melissa K. Stoller
wiley   +1 more source

Developmental differences in cortical bone structure in chimpanzee and human femora reflect early locomotor independence in humans

The Anatomical Record, EarlyView.
Abstract The cortical bone structure of long bone diaphyses changes throughout growth via skeletal modeling and has important implications for bone strength and structural integrity. Ontogenetic trends in diaphyseal structure have been identified in both chimpanzees and humans but it is not yet clear how these trends compare given notable differences ...
Karen R. Swan, Rachel Ives, Zewdi J. Tsegai, Louise T. Humphrey   +3 more
wiley   +1 more source

Historical birth records from 1896 to 1944 from the Basel maternity hospital, Switzerland, reveal significant obstetric selection pressures

The Anatomical Record, EarlyView.
Abstract Maternal and neonatal morbidity and mortality have declined dramatically during the last century. Historical data are therefore important sources to study the evolutionary selection pressures related to childbirth and how they have fluctuated over time.
Mirella Woodert, Guillermo Bravo Morante, Viktoria A. Krenn, Cédric Cordey, Nicole Torres‐Tamayo, Kaspar Staub, Nicole M. Webb, Martin Haeusler   +7 more
wiley   +1 more source

Human evolution and the obstetrical dilemma: The pelvic floor hypothesis

The Anatomical Record, EarlyView.
Abstract Human childbirth is mechanically difficult because a large‐headed, broad‐shouldered fetus must pass through a comparatively narrow, twisted bony birth canal. Traditional explanations of this “obstetrical dilemma” emphasize the role of bipedal locomotion in inhibiting the evolution of a wider, more spacious pelvis.
Barbara Fischer, Ekaterina Stansfield
wiley   +1 more source

The associations that income, education, and ethnicity have with birthweight and prematurity: how close are they?

Revista Panamericana de Salud Pública, 2018
Objectives. To identify evidence that income, education, or ethnicity might be associated with low birthweight, small-for-gestational-age birth, or preterm birth. Methods.
Ana Daniela Izoton de Sadovsky, Keila Cristina Mascarello, Angelica Espinosa Miranda, Mariangela F. Silveira   +3 more
doaj   +1 more source

Sleep in Young Children With Autism, ADHD and Combined Presentations

Autism Research, EarlyView.
ABSTRACT Autism and attention deficit hyperactivity disorder (ADHD) are often accompanied by sleep problems. Longitudinal studies hint towards a greater proportion of persisting sleep problems across early development in neurodivergent compared to neurotypical individuals. Within the context of a prospective infant sibling study of autism and ADHD (n = 
Eva‐Maria Kurz, Sven Bölte, Terje Falck‐Ytter   +2 more
wiley   +1 more source