Theories regarding the causes of hydrancephaly include:
blockage in the carotid artery: some researchers think that a blockage of the carotid artery leads to the under-/no development of the brain. The carotid artery is the most important blood supplier of the brain. With a blockage, the brain barely receives blood. Blood is necessary for development and keeping intact of the brain. inherited condition. infections: during the pregnancy, a woman can develop an infection in the uterus what can lead to problems with the neural tube. environmental toxins: during the pregnancy, a woman can be exposed to environmental toxins what can have effect on the health of the infant. Iniencephaly
Iniencephaly is a rare neural tube defect that results in extreme bending of the head to the spine. The diagnosis can usually be made on antenatal ultrasound scanning, but if not will undoubtedly be made immediately after birth because the head is bent backwards and the face looks upwards. Usually the neck is absent. The skin of the face connects directly to the chest and the scalp connects to the upper back. Individuals with iniencephaly generally die within a few hours after birth. Spina bifida
Spina bifida is further divided into two subclasses, spina bifida cystica and spina bifida occulta. Spina bifida cystica includes meningocele and myelomeningocele. Meningocele is less severe and is characterized by herniation of the meninges, but not the spinal cord, through the opening in the spinal canal. Myelomeningocele involves herniation of the meninges as well as the spinal cord through the opening.
Zinc acetate is a salt with the formula Zn(CH3CO2)2, which commonly occurs as the dihydrate Zn(CH3CO2)2·2H2O. Both the hydrate and the anhydrous forms are colorless solids that are used as dietary supplements. When used as a food additive, it has the E number E650. Uses
Zinc acetate is a component of some medicines, e.g., lozenges for treating the common cold. Zinc acetate can also be used as a dietary supplement. As an oral daily supplement it is used to inhibit the bodys absorption of copper as part of the treatment for Wilsons disease. Zinc acetate is also sold as an astringent in the form of an ointment, a topical lotion, or combined with an antibiotic such as erythromycin for the topical treatment of acne. It is commonly sold as a topical anti-itch ointment. Zinc acetate is used as the catalyst for the industrial production of vinyl acetate from acetylene:

Approximately 1/3 of the worlds production uses this route, which because it is environmentally messy, is mainly practiced in countries with relaxed environmental regulations such as China. Preparation
Zinc acetates are prepared by the action of acetic acid on zinc carbonate or zinc metal. Treatment of zinc nitrate with acetic anhydride is an alternative route. Structures
In anhydrous zinc acetate the zinc is coordinated to four oxygen atoms to give a tetrahedral environment, these tetrahedral polyhedra are then interconnected by acetate ligands to give a range of polymeric structures.In the dihydrate, zinc is octahedral, wherein both acetate groups are bidentate.