The four most common are stripping the membranes, breaking the mothers water, giving the hormone prostaglandin, and giving the synthetic hormone pitocin. Stripping the membranes does not work for all women, but can for most. A doctor inserts a finger into the mothers cervix and moves it around to separate the membrane connecting the amniotic sac, which houses the baby, from the walls of the uterus. Once this membrane is stripped, the hormone prostaglandin is naturally released into the mothers body and initiates contractions. Most of the time doing this only once will not immediately start labor. It may have to be done several times before the stimulant hormone is released, and contractions start. The next method is breaking the mothers water, which is also referred to as an amniotomy. The doctor uses a plastic hook to break the membrane and rupture the amniotic sac. Within a few hours labor usually begins. Giving the hormone prostaglandin ripens the cervix, meaning the cervix softens, thins out, or dilates. The drug Cervidil is administered by mouth in tablet form or in gel form as an insert. This is most often done in the hospital overnight. The hormone oxytocin is usually given in the synthetic form of Pitocin. It is administered through an IV throughout the labor process. This hormone stimulates contractions. Pitocin is also used to "restart" labor when it is lagging.The use of misoprostol is also allowed, but close monitoring of the mother is required.
Metallosis is the putative medical condition involving deposition and build-up of metal debris in the soft tissues of the body.Metallosis has been known to occur when metallic components in medical implants, specifically joint replacements, abrade against one another. Metallosis has also been observed in some patients either sensitive to the implant or for unknown reasons even in the absence of malpositioned prosthesis. Though rare, metallosis has been observed at an estimated incidence of 5% of metal joint implant patients over the last 40 years. Women may be at slightly higher risk than men. If metallosis occurs, it may involve the hip and knee joints, the shoulder,  wrist, elbow joints, or spine. In the spine, the wear debris and resulting inflammatory reaction may result in a mass often referred to as a "metalloma" in medical literature, which may lead to neurological impairment over time. A similar condition has been also described when titanium dental implant degradation occurs leading to inflammatory titanium particle-mediated Peri-implantitis. Titanium particles in the peri-implant tissues do not occur via functional abrasion but are thought to result from damaging hygiene procedures or due to complex electrochemical interactions caused by oral bacteria.The abrasion of metal components may cause metal ions to be solubilized. The hypothesis that the immune system identifies the metal ions as foreign bodies and inflames the area around the debris may be incorrect because of the small size of metal ions may prevent them from becoming haptens. Poisoning from metallosis is rare, but cobaltism is an established health concern.