Gestation period

Introduction Fetal programming is an idea that specific periods of development can be effected by maternal stimulus that has long term effects. “Theory of Fetal Programming” originated from Dr. David Baker and his colleagues at the University of Southampton stating that early growth and development in utero has a strong impact on the offspring later in life. The main maternal stimulus, nutrition is the most important due to direct and indirect effects on the different stages of development. It…

regulating adrenocortical growth and steroidogenesis within sheep fetus that is in late gestation period. The researchers observed a significant rise in the levels of ACTH 1-39 in the plasma between 120-125 and 136-142 days, but did not observe any change after the fetal hypothalamus and pituitary were surgically disconnected at 106-120 days of the gestation period. The results did not show the effect of both HPD and gestation age on the circulating concentrations of pro-ACTH and ACTH-containing…

the gap in mortality between black and white infants narrowed dramatically in this time period. Further more, post-neonatal mortality declined more rapidly than neonatal mortality. In addition, mortality from most infectious diseases declined rapidly from 1960 except for infections specific to the perinatal period, which increase infant…

Body structure and Symmetry Description The sphydrena barracuda also known as the Great Barracuda is described as a large fish usually around 50-110 lbs. The Great Barracuda has a silver and round body with dark patches. They are also known to have lighter side bands. Their mouth has an interesting feature with very sharp teeth and a large underslung jaw. They also have widely separated dorsal fins. The Great Barracuda has a bilateral symmetry (seaworld.org). Habitat Description The Great…

Hematotrophic phase: After third week of gestation, substances are transported passively via intervillous space. (Anju et al., 2011) Growth rate: Growth rate of fetus is linear up to 37 weeks of gestation, after which it plateaus (Anju et al., 2011). A slow growth rate and preterm labor can cause a low birth weight. Low birth weight (below 2000 grams) can increase…

them primigravid, housekeeper and educated eight years (middle school). At the time of the interview, the gestational age of two women was under 14 weeks, four women were between 14 and 28 weeks of gestation, nine women were higher than 28 weeks of gestation and five women were in the postnatal period (maximum of one week after delivery). The mean score of participants' spouse age was 25 years. All spouses were self-employee and the most of them were educated up to 12 years (diploma degree).…

patterns of many generations in a short period of time. Different model organisms are utilized in many different ways. In the case of this experiment, a model organism must have a rapid rate of maturation and reproduction. The use of Drosophila (fruit fly) was chosen for its fast gestation period and ease of trait comparison between generations (Cartier and Stewart, 2000). This allows for scientists to gather multiple generations worth of data in a short period of time to see the inheritance…

the increased progesterone from pregnancy comes from the corpus luteum, the placenta, or both. The purpose of this study is to detect pregnant and nonpregant females by creating a standard classifying system of detecting progesterone in early gestation periods and to estimate reproductive failures in the preceding breeding season. Fur seals were captured before implantation with a hoopnet and sedated. The animals were tagged and syringed for blood. Progesterone sampling was every twenty-six…

europaeus Hedgehogs are fascinating creatures! With such a small body length and only weighing a few ounces, it’s astonishing they are not categorized as rodents. What’s even weirder is that some hedgehogs eat dog food. Hedgehogs have a much shorter gestation period compared to other animals. Have you ever wondered what a hedgehog looks like? The head, body, and tail length is about 6-14 inches, and they only weigh about 14-39 ounces. The gender differences are very marginal. Males (boars) have…

in almost everyone’s daily life, whether you are a farmer benefiting from their production to live or you are a dairy product consumer. In this essay, we will see some important aspects concerning dairy cow reproduction; before, during and after gestation. Whether by natural means or artificial insemination, it is primordial for the farmer to know when and how long the cow has been in estrus to plan the pregnancies and calving’s. There are many different methods of detecting estrus in cows. The…