Over 400,000 pregnant women in badly affected Sindh province have been displaced by the floods, with only 891 making it to relief camps, according to data from the provincial government released on Friday.
The relief effort is a huge burden for an economy already needing help from the International Monetary Fund.
The United Nations has called for $160 million in aid to help the victims of the floods but Finance Minister Miftah Ismail said the cost of the damage was far higher than that.
"The total damage is close to $10 billion, perhaps more," Ismail said in an interview with CNBC.
"Clearly it is not enough. In spite of meagre resources Pakistan will have to do much of the heavy lifting."
Nevertheless, help from abroad is arriving.
Relief flights from the United Nations and countries including Turkmenistan and the United Arab Emirates arrived on Monday, the foreign ministry said in a statement.
Elsewhere in the region, floods are also threatening crisis-hit Sri Lanka, while rains have disrupted life in India's technology hub, Bengaluru.
The northern summer is the rainy season across much of Asia.
