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The placenta is a temporary embryonic and later fetal organ that begins developing from the blastocyst shortly after implantation. It plays critical roles in facilitating nutrient, gas and waste exchange between the physically separate maternal and fetal circulations, and is an important endocrine organ, producing hormones that regulate both maternal and fetal physiology during pregnancy. The placenta connects to the fetus via the umbilical cord, and on the opposite aspect to the maternal uterus in a species-dependent manner. In humans, a thin layer of maternal decidual (endometrial) tissue comes away with the placenta when it is expelled from the uterus following birth. Placentas are a defining characteristic of placental mammals, but are also found in marsupials and some non-mammals with varying levels of development.
Stillbirth is typically defined as fetal death at or after 20 or 28 weeks of pregnancy, depending on the source. It results in a baby born without signs of life. A stillbirth can often result in the feeling of guilt or grief in the mother. The term is in contrast to miscarriage, which is an early pregnancy loss, and Sudden Infant Death Syndrome, where the baby dies a short time after being born alive.
A birthmark is a congenital, benign irregularity on the skin which is present at birth or appears shortly after birth—usually in the first month. Birthmarks can occur anywhere on the skin. They are caused by overgrowth of blood vessels, melanocytes, smooth muscle, fat, fibroblasts, or keratinocytes.
Rh disease is a type of hemolytic disease of the fetus and newborn (HDFN). HDFN due to anti-D antibodies is the proper and currently used name for this disease as the Rh blood group system actually has more than 50 antigens and not only the D-antigen. The term "Rh Disease" is commonly used to refer to HDFN due to anti-D antibodies, and prior to the discovery of anti-Rho(D) immune globulin, it was the most common type of HDFN. The disease ranges from mild to severe, and occurs in the second or subsequent pregnancies of Rh-D negative women when the biologic father is Rh-D positive.
Pregnancy is the time during which one or more offspring develops (gestates) inside a woman's uterus (womb). A multiple pregnancy involves more than one offspring, such as with twins.
Fetal surgery also known as antenatal surgery, prenatal surgery, is a growing branch of maternal-fetal medicine that covers any of a broad range of surgical techniques that are used to treat congenital abnormalities in fetuses who are still in the pregnant uterus. There are three main types: open fetal surgery, which involves completely opening the uterus to operate on the fetus; minimally invasive fetoscopic surgery, which uses small incisions and is guided by fetoscopy and sonography; and percutaneous fetal therapy, which involves placing a catheter under continuous ultrasound guidance.
Fetal rights are the moral rights or legal rights of the human fetus under natural and civil law. The term fetal rights came into wide usage after Roe v. Wade, the 1973 landmark case that legalized abortion in the United States. The concept of fetal rights has evolved to include the issues of maternal substance use disorders, including alcohol use disorder and opioid use disorder. Most international human rights charters "clearly reject claims that human rights should attach from conception or any time before birth." While international human rights instruments lack a universal inclusion of the fetus as a person for the purposes of human rights, the fetus is granted various rights in the constitutions and civil codes of several countries.
Dobson v Dobson, [1999] 2 SCR 753 was a landmark decision by the Supreme Court of Canada on a pregnant woman's legal duties in tort law. It was the first time the Supreme Court of Canada had to consider this issue. The majority of the Court found that tort claims cannot be brought against women for negligence toward the fetus during pregnancy.
In pregnancy terms, quickening is the moment in pregnancy when the pregnant woman starts to feel the fetus's movement in the uterus.
Maternal–fetal medicine (MFM), also known as perinatology, is a branch of medicine that focuses on managing health concerns of the mother and fetus prior to, during, and shortly after pregnancy.
Taegyo refers to a set of practices and beliefs related to prenatal development. Taegyo is said to be regulations that a mother should observe in order to have good effects on her unborn child during maternity. Also, it is the education occurring in the period of maternity and considered that when an expectant mother tries to be careful of everything, prudent in speech and action, and keep distance from evil thoughts, it affects the unborn child in good ways. In other words, Taegyo is all the effort for the mother to provide the best environment for the fetal development. This is based on the belief that fetal environment has a huge influence on the fetal development and the whole life of the baby.
A fetus or foetus is the unborn offspring that develops from an animal embryo. Following embryonic development, the fetal stage of development takes place. In human prenatal development, fetal development begins from the ninth week after fertilization and continues until birth. Prenatal development is a continuum, with no clear defining feature distinguishing an embryo from a fetus. However, a fetus is characterized by the presence of all the major body organs, though they will not yet be fully developed and functional and some not yet situated in their final anatomical location.
Circumvallate placenta is a rare condition affecting about 1-2% of pregnancies, in which the amnion and chorion fetal membranes essentially "double back" on the fetal side around the edges of the placenta. After delivery, a circumvallate placenta has a thick ring of membranes on its fetal surface. Circumvallate placenta is a placental morphological abnormality associated with increased fetal morbidity and mortality due to the restricted availability of nutrients and oxygen to the developing fetus.
Prenatal nutrition addresses nutrient recommendations before and during pregnancy. Nutrition and weight management before and during pregnancy has a profound effect on the development of infants. This is a rather critical time for healthy development since infants rely heavily on maternal stores and nutrient for optimal growth and health outcome later in life.
Foeticide, or feticide, is the act of killing a fetus, or causing a miscarriage. Definitions differ between legal and medical applications, whereas in law, feticide frequently refers to a criminal offense, in medicine the term generally refers to a part of an abortion procedure in which a provider intentionally induces fetal demise to avoid the chance of an unintended live birth, or as a standalone procedure in the case of selective reduction.
Obstetric medicine, similar to maternal medicine, is a sub-specialty of general internal medicine and obstetrics that specializes in process of prevention, diagnosing, and treating medical disorders in with pregnant women. It is closely related to the specialty of maternal-fetal medicine, although obstetric medicine does not directly care for the fetus. The practice of obstetric medicine, or previously known as "obstetric intervention," primarily consisted of the extraction of the baby during instances of duress, such as obstructed labor or if the baby was positioned in breech.
Maternal somatic support after brain death occurs when a brain dead patient is pregnant and their body is kept alive to deliver a fetus. It occurs very rarely internationally. Even among brain dead patients, in a U.S. study of 252 brain dead patients from 1990–96, only 5 (2.8%) cases involved pregnant women between 15 and 45 years of age.
Intragenomic and intrauterine conflicts in humans arise between mothers and their offspring. Parental investment theory states that parents and their offspring will often be in conflict over the optimal amount of investment that the parent should provide. This is because the best interests of the parent do not always match the best interests of the offspring. Maternal-infant conflict is of interest due to the intensity of maternal investment in her offspring. In humans, mothers often invest years of care into their children due to the long developmental period before children become self-sufficient.
Fetal programming, also known as prenatal programming, is the theory that environmental cues experienced during fetal development play a seminal role in determining health trajectories across the lifespan.
Maternal-fetal conflict, also known as obstetric conflict, occurs when a pregnant individual's (maternal) interests conflict with the interests of the fetus. Legal and ethical considerations involving women's rights and the rights of the fetus as a patient and future child, have become more complicated with advances in medicine and technology. Maternal-fetal conflict can occur in situations where the mother denies health recommendations that can benefit the fetus or make life choices that can harm the fetus. There are maternal-fetal conflict situations where the law becomes involved, but most physicians avoid involving the law for various reasons.
References
- ↑ Havelock Ellis, Studies in the Psychology of Sex, vol. 5 p. 218
- ↑ Randolph, Vance (2013-06-18). Ozark Superstitions. Read Books Ltd. ISBN 978-1-4733-8824-6.
- ↑ Egger, Andjela N.; Chowdhury, Aneesa R.; Espinal, Maria C.; Maddy, Austin J. (2019-07-30). "Birthmarks: Tradition, Culture, Myths, and Folklore". Dermatology. 236 (3): 216–218. doi:10.1159/000501273. ISSN 1018-8665.
- ↑ Leland, Charles Godfrey (2007-01-01). Etruscan Roman Remains. Cosimo, Inc. ISBN 978-1-60206-666-3.
- ↑ Spengler, Oswald, The Decline of the West, Knopf, NYC, 1928, vol. 2 p. 126
- ↑ Pliny Natural History VIII:126