sex rate

Although fertility culture marriage opinion and fertility policy have certain effect on the birth sex rate, the decisive reasons are boys preferring for boy and gender selection.

生育文化、婚嫁观念、生育政策对出生性别比都有一定的影响，但是，起决定作用的是男性偏好和性别选择。

Review the relative theories of the birth sex rate and theoretical research on relative elements such as number of birth, numeral of mother's fertility, fertility rate, fertility policy, statistic quality, fertility culture, marriage opinion and management.

回顾了出生性别比相关理论以及与出生性别比有关的因素如出生数量、出生孩次、生育率、生育政策、统计质量、生育文化、婚嫁观念、管理等因素的理论研究。

She modestly suggests that 'sex, or at any rate gender, may account for the difference'

她谨慎地提出“性别，至少是男女的性征，也许能解释这个差异”。

A survey was conducted with a self-designed questionnaire including sex, age, specialty, English level, support rate, proportion of understanding, and suggestions.

采用自行设计的调查问卷进行集中统一调查，内容包括性别、年龄、专业、英语水平、支持程度、授课评价、听懂比例、授课建议等。

Propose three means and approaches to solve the problem of Hunan birth sex rate: adjusting fertility policy, prompting new marriage culture and the whole management of fertility behavior.

提出了解决湖南出生性别比问题的方法和途径：生育政策的调整、推进新型的婚育文化、发展农村经济和建立农村养老保障机制、对生育行为的全程管理。

Effects of Age, Sex and Heart Rate Alterations on Systolic and Diastolic Timing Intervals During Cardiac Cycle in Normal Subjects: A Combined M-Mode and Doppler Echocardiographic Study

超声心动图观察年龄、性别及心率等因素对心动周期各时相的影响

She modestly suggests that "sex, or at any rate gender, may account for the difference"

她谨慎地提出“性别，至少是男女的性征，也许能解释这个差异”。