One, two or three IVF treatments are government subsidised for women who are younger than 40 and have no children. The rules for how many treatments are subsidised, and the upper age limit for the women, vary between different county councils.[154] Single women are treated, and embryo adoption is allowed. There are also private clinics that offer the treatment for a fee.[155]
^ Tan K, An L, Miao K, Ren L, Hou Z, Tao L, Zhang Z, Wang X, Xia W, Liu J, Wang Z, Xi G, Gao S, Sui L, Zhu DS, Wang S, Wu Z, Bach I, Chen DB, Tian J (March 2016). "Impaired imprinted X chromosome inactivation is responsible for the skewed sex ratio following in vitro fertilization". Proceedings of the National Academy of Sciences of the United States of America. 113 (12): 3197–202. Bibcode:2016PNAS..113.3197T. doi:10.1073/pnas.1523538113. PMC 4812732. PMID 26951653.
All pregnancies can be risky, but there are greater risk for women who are older and are over the age of 40. The older the women the riskier the pregnancy. As women get older, they are more likely to suffer from conditions such as gestational diabetes and pre-eclampsia. If older women do conceive over the age of 40, their offspring may be of lower birth weight, and more likely to requires intensive care. Because of this, the increased risk is a sufficient cause for concern. The high incidence of caesarean in older mothers is commonly regarded as a risk.
In males with hepatitis B, The Practice Committee of the American Society for Reproductive Medicine advises that sperm washing is not necessary in IVF to prevent transmission, unless the female partner has not been effectively vaccinated.[37][38] In females with hepatitis B, the risk of vertical transmission during IVF is no different from the risk in spontaneous conception.[38] However, there is not enough evidence to say that ICSI procedures are safe in females with hepatitis B in regard to vertical transmission to the offspring.[38]
Luteal support is the administration of medication, generally progesterone, progestins, hCG, or GnRH agonists, and often accompanied by estradiol, to increase the success rate of implantation and early embryogenesis, thereby complementing and/or supporting the function of the corpus luteum. A Cochrane review found that hCG or progesterone given during the luteal phase may be associated with higher rates of live birth or ongoing pregnancy, but that the evidence is not conclusive.[79] Co-treatment with GnRH agonists appears to improve outcomes,[79] by a live birth rate RD of +16% (95% confidence interval +10 to +22%).[80] On the other hand, growth hormone or aspirin as adjunctive medication in IVF have no evidence of overall benefit.[30]
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