As Singapore Prime Minister Lawrence Wong prepares to unveil plans to ease the strain on families during his National Day Rally speech on Sunday, a new survey points to a difficult question behind the city state’s record-low fertility rate: what if a substantial share of residents no longer want children at all? Nearly one in four Singaporeans aged 18 to 44 surveyed by YouGov in July said they had no children and did not intend to have them in the future. Zahir Latif and his wife are among...