She announced no new measures to raise the female employment rate or encourage women to work full-time but urged employers to be "open to the wishes of their male and female workers."
The 58-year-old chancellor's Christian Democrats (CDU) portray the traditional family as the cornerstone of society, but Merkel is often accused of doing little to help women despite being probably the world's most powerful female politician.
She faces economic and political pressure to make life easier for working mothers in a country where women who go out to work instead staying home to look after small children were once branded "raven mothers."
The Organization for Economic Cooperation and Development (OECD) said in a report last month that Germany should remove "impediments" to women's participation in the workforce.
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While 68 percent of German women have jobs, higher than the OECD average of 60 percent, hours worked by mothers and married women are significantly below the OECD average, it said.
Merkel introduced child benefit payments in her first term in 2006 to try to boost a dwindling birth rate, which is forcing Germany to recruit foreign workers to offset a lack of skilled labor for an economy which has proved resilient.
While Berlin is straining to find enough staff to fill its vacancies, Spain announced a plan on Tuesday to try to ease mass unemployment among young people, with one in two out of work due to a relentless tide of layoffs. Some are studying German or English and emigrating in search of jobs.
Spanish Prime Minister Mariano Rajoy presented 100 measures worth 3.5 billion euros ($4.6 billion) over four years including tax breaks for young freelance workers and for companies that hire workers in their twenties. Many of the measures had been previously announced.
The OECD criticized a 2009 German government proposal to pay a welfare benefit to stay-at-home parents. This was intended to relieve pressure for thousands of new nursery places, which the state will struggle to provide from August for all one-to-three year-olds as required by law.
Critics say it amounts to a bribe for immigrants and poor people to keep their children out of kindergarten, where they have a better chance of integrating. It also gives poor mothers an incentive to stay out of the labor market.
Even Merkel's own coalition cannot agree about the subsidy, making it a target for the Social Democrats (SPD), who aim to unseat Merkel in September.
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The SPD is struggling in opinion polls partly because Merkel has co-opted center-left issues such as opposition to nuclear power and support — albeit lukewarm — for a legal minimum wage.
The Social Democrats tried to hijack the "family summit" by promising to spend billions of euros on all-day kindergartens instead of stay-at-home parents if they win the election. This would be financed by an increase in the top-rate income tax.
The minister for family and women's affairs, Kristina Schroeder, said companies should take some responsibility for providing childcare facilities themselves.
"You can't always just rely on the state, so if companies really want young mothers to return to work quickly they should make a good offer," she said. Young parents should also have the right to work part-time for a few years and then return to full-time work, she added.
Schroeder, 35, is the first German woman to give birth while serving as a cabinet minister. She said she also wanted to spend time with her daughter and not rely on a "24-hour kindergarten". Another cabinet member, Ursula von der Leyen, is labor minister while being a mother of seven. Merkel herself has no children.