First of all a blog post is not a valid source. Once source made a good point:

The main problem is that for a Russian woman home and family is still the most important thing. “Women have a great social activity level in Russia, but they also don’t want to lose the private sphere”, said Ushakova. “We want to act in social sphere but also succeed as mothers and wives”. So choosing between career and family women often choose the second option.

“We don’t have institutional structures that would discriminate women”, said the sociologist, “but on the level of stereotypes and consciousness discrimination exists”

This problem is not unique to Russia, however they are ahead in certain areas. For example women get 2 years paid maternity leave for every child and the company has to take them back when they're ready. Here in the states my wife had to go back to work after 4 weeks which was very hard.