China's Wang Nan took her third gold medal, teaming up with Zhang Yining to beat Lee Eun-sil and Seok Eun-mi of South Korea 4-0 in the women's table tennis doubles.
Despite the relaxation of the one-child policy in 2016, the number of live births per 1,000 people fell to a record low of 10.48 in 2019, down from 10.94 in 2018.
Saina, who has been battling illness and injuries, is going through a bad patch, having lost six times in the first round this season.
Commonwealth Games bronze medallists Ashwini Ponnappa and N Sikki Reddy scored a stunning straight games victory over world No. 18 Li Wenmei and Zheng Yu to make it to the second round in the women's doubles at the US $350,000 India Open, in Delhi, on Tuesday.