Medical News Today. https://www.medicalnewstoday.com/articles/322368.php
Diakses pad 20 September 2019 Healthline. https://www.healthline.com/health/pregnancy/signs-of-having-baby-girl
Diakses pada 20 September 2019Flo. https://flo.health/pregnancy/find-out-baby-gender
Diakses pada 20 September 2019American Psychological Association. https://www.apa.org/monitor/2008/09/gender
Diakses pada 21 April 2021