رشد جنین

In medicine, the primary meaning for "death" in a human or living being is the cessation of natural or physiological activity forever. The term apoptosis can be found for "death" in the basic medical sciences.

This study was conducted by reviewing some documents andinterpretation of evidence.

The command of death is institutionalized in all creatures at the time of their creation, and these two creatures, namely death and life, started their work together from the beginning, but the commands of death are more active at the end of the creature's work, and the commands of life are more active at the beginning.We will faceAjalMusamma, if everything goes normally, and if the factors accelerate death, we will face AjalMu'allaq.Scientific development can give man the power to minimize the accelerating factors of death and only lead to AjalMusamma.In fact, what accelerates our death is in our own hands and due to our ignorance. Problems with the imbalance in life and death, such as increased cell proliferation, decreased cell apoptosis, can be capable of disrupting cell death.At different stages of embryo formation, death and life are involved in development of program of forming a healthy bodyin a managed balance.Therefore, the death plan of some cells must be pre-written in parallel with the survival of other cells.Therefore, death must be designed before life so that it can act before the formation of living cells.

What has been said is an interpretation of death and life at the level of naturee. The shift from chemicals to biomaterials is happening because there is a degradability in bioproducts without any complication. Therefore, the design of death at the time of production of a product has arisen from wisdom. When we believe that God is the absolute wise, we can see the highest manifestations of this design in God's creation.

Throughout the centuries and eras, human beings have always sought to know the world around them and, consequently, to find the way to the depths of their existential nature. The Holy Quran has paid attention to this important matter as an eternal divine miracle and has been considered by scholars of different sciences as a reliable source. Despite all these advances in the experimental sciences, so far only parts of the miracles and scientific secrets of the Qur'an have been discovered for humanity. Despite the astonishment of experimental scientists in the deep scientific content of the Qur'an, throughout history, some people with specific goals have sought to cast doubt on the divine revelations. The focus of this article, which is based on content analysis method and using organized library studies, is to answer three of the doubts raised in the book "Critique of the Qur'an" about the stages of fetal development, using Qur'anic verses. One of the most important results of this article is that the suspicions created by Suha (the author of the book) have fundamental problems and the medical content in the Qur'an is consistent with the findings of modern sciences.

Etiologically, oxidative stress can be considered as one of the reasons for defective embryonic development which leads to developmental arrest due to necrosis or apoptosis. Under in vivo conditions, multiple mechanisms act to protect the embryo against reactive oxygen species (ROS), but under in vitro conditions most of these mechanisms are absent leading to higher levels of ROS in the culture medium. The objective of this study was to compare the antioxidant effects of Tempol, 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine-1-oxyl, a permeable synthetic antioxidant, on mouse pre-implantation embryonic development in vitro conditions in the presence or absence of oxidative stress. Mature oocytes from mouse were retrieved following ovarian stimulation by the administration of Pregnant Mare Serum Gonadotropin (PMSG) and hCG. Upon in vitro fertilization, the zygotes were cultured in different groups in HTF medium containing 4 mg/ml BSA. To study the effects of oxidative stress on embryo development, the zygotes were cultured for an hour in a medium containing different concentrations of H2O2. After washing, the zygotes were transferred to the culture plate. The zygotes were later placed in the media containing different concentrations of Tempol following their culture in 10 µM H2O2 for one hour to study the effects of different concentrations of the substance in the absence of other oxidative stresses. The data were later compared and statistically analyzed. The pre-implantation embryonic development decreased significantly in the case group, compared to the control group after a short exposure to H2O2, – the effect being more noticeable in higher concentrations. Tempol reduced the impairments resulting from the oxidative stress to some extent. Under in vitro conditions and a concentration of 0.5 µM, Tempol improved embryonic development quality, quantitatively and morphologically. Tempol increased the percentage of two-cell embryos from 91.78% in the control group to 96.99% (p < 0.05), blastocysts from 67.80% in the controls to 81.33% (p < 0.05) in the cases, and significantly decreased embryonic arrest from 32.19% in the controls to 18.67% in the cases (p < 0.05). ROS has a major role in embryonic arrest, witnessed in embryo cultures in vitro conditions. The present study showed that supplementation of embryo cultures with Tempol improved the embryonic development. It seems that addition of permeable synthetic antioxidants, such as Tempol, to embryo cultures could protect embryos from oxidative damage and improve embryonic development.

Exercise is an integral component of physical and mental health. Attention to exercise in women, regarding their physiologic situation is essential. This study aimed to investigate the effect of a specific aerobic exercise program on fetal growth in pregnant women.Methods & Materials: In this clinical trial, 39 pregnant women in 24-32 weeks of gestation were enrolled. The participants were randomly allocated to experimental (n=18) and control (n=21) groups. Women with single pregnancies and intact amniotic membranes were included. Women who had any contraindications for exercise were excluded from the study. Exercise program included stretching and flexibility exercise and aerobic exercise (constant walking for 30-45 minuets) three days a week for eight weeks. Data were analyzed using descriptive statistics, c2, t-test, Kolmogro-smirnov and repeated measurements. P<0.05 was considered to be significant. The results showed a 1.37% increase in the newborn's weight in the intervention group; however, the difference was not statistically significant. The average of head circumference and newborn's length in the intervention group's newborns were 0.21cm and 0.09cm more than the control group's newborns, respectively. These differences were not statistically significant too (P>0.05). There were no reductions in the growth of the fetuses following the exercise activities. This kind of exercise has no adverse effect on fetal growth.