"Even if they marry, they move her overseas, then she does not know how [to return] from there", Pletnyova, who is known for her conservative remarks, told the Govorit Moskva (Moscow Speaks) radio station on Wednesday.
The FIFA 2018 World Cup kicks off when hosts Russian Federation take on Saudi Arabia at Luzhniki Stadium on Thursday.
A senior law maker in Russia Tamara Pletnyova who gave the charge on Wednesday said sex with foreigners while the competition lasted could result into pregnancy later leading to single motherhood.
Asked if the World Cup could boost Russia's birth rate - a key goal for President Vladimir Putin - Pletneva replied: "We should be giving birth to our own children".
"It's good if it's one race, but if it's another race, then they really did".
'It's the children who suffer. and have suffered since the Soviet era.
Stating that she was "not a nationalist", Pletnyova added, 'nonetheless, I know how children suffer later on.
She said that children risked being "abandoned and just left with their mother;" or, alternatively, being taken overseas by their fathers, urging women to marry "Russian citizens".
'Then they come to see me at parliament and cry that their children were taken away, snatched from them.
"I'd like people in our country to marry for love, no matter what nationality as long as they are Russian citizens who will build a family, live peacefully, have children and raise them".
However, her comments drew both criticism and ridicule.
"Those who get harassed are probably the ones who want it themselves and give the occasion for it", she said in March, claiming that introducing laws in Russian Federation for the offense is "excessive". If a woman doesn't want it, no one is going to harass her, ' she told Gazeta.ru news site in February. A Russian lawmaker has told local women to keep away from foreigners during the World Cup and instead marry Russian men.
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