Minority Sex Ratio At Birth Increased Mechanism Analysis

It is very important for the research on the problem of minority sex ratio at birth because of special family planning policy and different culture and traditional customs. This paper has taken the sex ratio at birth increased during the fertility transition with the sex preference for the gender bias of changing as direct consequence, and has analyzed some nationalities increased history and nowadays situation of sex ratio at birth and with the methods used by the human population study of cultural materialist Marvin Harris's perspective on the village of sex preference analysis of the causes and consequences.First, using the methods of sex parity progression to evaluate the sex preferences of different nationalities, and its impact to the sex ratio at birth increased. At the same time analyzing normal situation and regulation of the historical data from China and other countries to study without modern sex determination or sex preferences without more serious conditions. From U.S. census data found that the two pure girl households in the U.S. the sex ratio at birth is decreased with increasing parity, pure male sex ratio at birth of families with children increased, following this with China in 1990 and 2000 results are very big difference, so from a purely male household and pure girl family sex ratio changes in Parity Progression as to judge the extent of gender bias of the indicative indicator.Secondly, according to the 1982 census of China on the use of mother-child matching method to construct the different years of women's reproductive Parity Progression status, found that pure girl households of Han Parity Progression sex ratio at birth began to rise in 1980, while the Miao for the sample size effects, but overall trend is from the family in 1992 after the birth of pure girl family sharp rise in the next child's sex, sex selection behavior is obverse emerged.Third, the female baby data is not real caused by under report of statistical. It is not actually only one of the reasons. The female baby under report has been an important reason for sex ratio at birth increased. After analysis of census data by nationalities, the ethnic younger population omission does exist, omissions, change of ethnic composition factors such as the younger population of some ethnic sex differences in data quality issues, the differences among different ethnic groups are significantly different which reflect the existence of gender differences in rates differ.Fourth, through the village to confirm the data showed that omission by the population migration, time of birth, parity, gender, and whether the birth excesses family planning policy. The quality of the data at the township level by the unscientific and unreasonable evaluation index of family planning, so that grassroots cadres in the data generating mechanism that permits to form village-level birth data are omitted, the township's "processing" the real data closer to family planning assessment targets, especially in sex ratio at birth as markers of birth after the distortion of statistical data of gender has also inevitable, so there data on the birth sex ratio balance is necessary or no choice.Fifth, according to Harris of human social cultural system, and the relationship between the various components to analysis fertility transition during sex ratio at birth increased which has demonstrated:on the one hand, the conflicts between the population reproduction and the material production will force to change the way of population reproduction, but the process is slow. The family planning policy has promoted the acceleration of this process, and this accelerated process have not changed the social and cultural systems to reduce gender needs, on the contrary, the limitation of the number of children has speed up the sex selection. On the other hand, the decision from the basic structure of view, the basic structure constrained by the mode of production. The style of family planning, culture, gender needs, due to geographical location, education level, language miscommunication occurred under circumstances conditions has changed very little, so the lack of change in opportunities for gender needs.Sixth, from the family point of view, the basic structure provided under conditions of limited resources, the formation of sex preference has its inevitability. Miao typical patrilineal inheritance of property within the family guaranteed their own room in the family in circulation, but will not be circulated to the married daughter into the family of the husband, the no parent-child inheritance, in practice it is also established in the paternal lineage successor. As the daughter married, she is not part of the family, parents with dowry in the form of her participation in the family inheritance, in real life, in daily contact with her family is "guest" status occurs, so that parents can not participate in support, and by his son,, inheritance, elder support has produced his son's needs while family inheritance stimulate the negative side of this partial male sex preference. In conditions of limited resources, a child and a daughter, sons and daughters is the idealized will of the desired fertility.Seventh, with the corresponding population reproduction of society, the family also exist population reproduction, which has its gender structure, reproduction, before the fertility transition is guaranteed through a multi-born son, but the change occurs after birth to ensure a son was born to meet the family prerequisite for normal reproduction. In the context of limited resources, the family of a child and a daughter of population reproduction, family size to ensure his son is a prerequisite for simple reproduction, but also to meet the family inheritance, pension and other needs, continue for generations to come. The birth was by changing the natural human choice, is bound to change the law of nature, changing the natural distribution of sex ratio at birth, gender preferences into a sex selection, which led to high overall sex ratio at birth.Eighth, cultural and economic needs of boys so that no son or no son most likely family tried various ways to get a son by bridge, back child, B super-selective abortion, post-natal sex selection, At the same time gave birth to second child but also to escape being arrested by family planning departments to do men ligation operation.Through the bridge, back to the child such as the legalization of sex selection in the ethical.Ninth, it has some practical difficulties to deal with the sex ratio at birth.Sex Ratio at Birth control measures in the Miao Village of the environment, interest-oriented mechanism to stimulate the local villagers who depend on their children or old age have a certain effect, to solve support problems and improve the two-girl family life, both for family planning direct assistance to households, but also can serve as an example, is relatively straightforward. And improve hospital delivery rate in the local medical system and its own notion of the economic need to be considered and ideas on possible practical implementation, thus reducing the proportion of abandoned baby drowning. And male mate choice has been difficult emerged cause the attention of local villagers, hoping to play a role to change in sex preference in the future. Through the city of the stockade in the community and from acquaintances in the current succession system, freed, for the present or are difficult.