The sort of doppler that you are using: Distinct gels are designed for differing kinds of dopplers. Be sure to find a gel that's suitable with all your gadget. For those who have any questions about using fetal doppler gel, be sure you talk to your health practitioner or midwife. https://andrerhvin.blogdosaga.com/15819702/not-known-facts-about-best-fetal-doppler-monitor