The Fourth Trimester Podcast is available on iTunes, Google Play, and via a wide range of radio sites and podcast apps such as Overcast, Pocket Casts, Otto Radio, Castro, Breaker and more.
iTunes:
https://itunes.apple.com/us/podcast/fourth-trimester-podcast-first/id1092879503
Google Play: (See next section if this link doesn't work)
Otto Music: (alternative for Android users)
If Google Play Music isn't showing you the podcast, we highly recommend using the Otto Radio app or site:
https://www.ottoradio.com/podcast/fourth-trimester-podcast--the-first-months-and-bey