China¡¯s one-child policy, perhaps the biggest attempt at social engineering in history, came to an end last year. Under pressure from an ageing population, the authorities announced in October that couples would be allowed to have two children, scrapping a policy that had been in place since 1979.

It was widely credited with having prevented 400 million births, although this claim has been who traced it back to a Chinese government study from the late 1990s. A number of that birth rates would have come down with rising prosperity ¨C as they have in other countries ¨C regardless of state intervention.

Whatever the overall impact was, it did usher in an age of families without boys in a society where many parents traditionally kept trying for more children until they got a boy.

These girls did not have to compete with brothers for resources and attention, and so were able to blaze a trail through China¡¯s universities, according to a paper from Ye Liu, senior lecturer in international education at Bath Spa University.

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¡°They joked that if they had a brother, they wouldn¡¯t be treated equally,¡± Liu says of the women she interviewed for the study. ¡°A lot of girls, particularly from urban areas, told me their life stories. They were constantly reminded of being lucky¡± for having been only children, she says.

The statistics back this up, according to "Women rising as half of the sky? An empirical study on women from the ¡®one-child¡¯ generation and their ÖйúAƬ participation in contemporary China".

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Surveying nearly 1,000 undergraduates at universities in the eastern provinces of Anhui and Zhejiang, Liu found that singleton female students did substantially better than those with siblings.

They performed far better on the gao kao, China¡¯s university entrance test, and were much better represented at "elite" universities. Singleton girls were also more likely to choose an arts, humanities or social science subject.

The one-child policy also coincided with a jump in the proportion of women on Chinese campuses. For the cohort born just before it was introduced, women accounted for just over 35 per cent of students. Immediately afterwards, women made up 41 per cent, and that has been rising ever since (in terms of tertiary enrolment, women overtook men in 2008, ).

Will they turn back time?

But now the one-child policy is over, could Chinese patrilineal culture reassert itself, and sisters lose out to brothers in the fight for ÖйúAƬ?

Few expect a baby boom after the . ¡°Due to the high cost of property, education and childcare in urban areas it¡¯s very difficult¡± to afford another child, says Liu.

But those parents who do take advantage of the policy¡¯s demise could revert to older customs, she fears.

¡°If both boys and girls pass the [university entrance] exam, then they would prioritise the boy,¡± she predicts.

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Such discrimination is already happening when it comes to property. Leftover Women: The Resurgence of Gender Inequality in China, a book published in 2014, explores misogynist pressure on educated women to marry ¨C lest they become ¡°leftover¡± ¨C and the widespread prioritisation of sons over daughters when parents contribute savings towards a marital home.

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According to the author Leta Hong Fincher, a visiting assistant professor at Columbia University, it is ¡°certainly a possibility¡± that this pattern could replicate itself when it comes to ÖйúAƬ costs, although it is impossible to know for sure.

Furthermore, there is now ¡°a tremendous backlash against women in ÖйúAƬ¡±, she says. ¡°The government sees the success of women¡­as a problem for male students."?

In 2012, widespread discrimination against women by Chinese universities, who were subject to quotas and higher entrance criteria than men.

Leftover Women also explored rhetoric from Chinese state media warning women that too much ÖйúAƬ could ruin their chances of finding a husband. ¡°That has had a real effect on parents and women themselves,¡± Fincher says. Men still far outnumber women at the PhD level, she says.

Impediments to female success in Chinese universities are being debated in China itself. In a , Wang Liming, a professor of life sciences at Zhejiang University, found a pattern that will be familiar to those in the UK or the US: women in science were progressively less represented at higher levels.

The research also appeared to reveal troubling attitudes from male science professors. They tended to see their male students as having more ability and enthusiasm for their work (female professors observed no such gender difference).

For Liu, even though women have successfully broken into ÖйúAƬ, parental expectations still hold them back. ¡°Parents still have much higher expectations of boys,¡± she says, which stymies female graduates¡¯ future careers.

And successful women of the one-child policy generation often told her: ¡°My parents treated me as if I was a boy."

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david.matthews@tesglobal.com