1. Births: final data for 2019;Martin;Natl Vital Stat Rep,2021
2. Statistics Canada. Live births and fetal deaths (stillbirths), by type of birth (single or multiple). 2021. Available at:https://www150.statcan.gc.ca/t1/tbl1/en/tv.action?pid=1310042801. Accessed June 1st, 2021.
3. Euro-Peristat Project. European Perinatal Health Report. Core indicators of the health and care of pregnant women and babies in Europe in 2015. 2018. Available at: www.europeristat.com. Acccessed June 1st, 2021.
4. Statistics Netherland. 2020. Available at: https://www.cbs.nl/en-gb. Accessed May 27, 2021.
5. Australian Bureau of Statistics. Births, Australia. 2020. Available at: https://www.abs.gov.au/statistics/people/population/births-australia/latest-release. Accessed May 27, 2021.