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Timing of Childbearing Among Singaporean Married Couples
Initial registration date
April 09, 2018
April 09, 2018 2:47 PM EDT
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Lee Kuan Yew School of Public Policy, National University of Singapore
Other Primary Investigator(s)
Additional Trial Information
Singapore’s total fertility rate stands at 1.25, well below the population replacement level. One of the reasons for the low rate is a relatively high average age at childbearing. This study attempts to understand the factors behind timing of parenthood after marriage, including the attitudes and motivations of Singaporean women towards childbearing, as well as the constraints and issues they face.
This research study involves two stages.
1. An interviewer will visit the participant at their residence, a café or similar public space. They will ask some questions about their family, views about having children in Singapore and work-life balance. In addition, there will be some confidential questions, e.g. frequency and satisfaction with sexual activity within marriage, life and marital satisfaction, and height and weight. These questions will not be asked by the interviewer but through a computerized self-administered questionnaire. The interview will take up to 60 minutes. All participants will receive a token of appreciation in Fairprice vouchers. In addition, some participants will be randomly selected to receive an additional gift and some instructions on how to use it.
2. For the next 14 weeks after the interview, they will receive biweekly messages via email and/or Whatsapp. The message will provide them with an online link to online diary with questions. The questions will take around five minutes to answer. Participants who complete the online diary will receive a token of appreciation in Fairprice vouchers.
In addition, up to 20 individuals out of 660 participants may be invited to participate in a one-time 90-minute focus group discussion. Invited participants can accept or refuse the invitation without penalty.
Intervention Start Date
Intervention End Date
Primary Outcomes (end points)
Frequency and timing of sexual activity
Primary Outcomes (explanation)
Secondary Outcomes (end points)
Secondary Outcomes (explanation)
Some participants will be randomly selected to receive an additional gift and some instructions on how to use it.
Experimental Design Details
Was the treatment clustered?
Sample size: planned number of clusters
Sample size: planned number of observations
Sample size (or number of clusters) by treatment arms
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
INSTITUTIONAL REVIEW BOARDS (IRBs)
National University of Singapore IRB
IRB Approval Date
IRB Approval Number