This appears to be a reliable source, coming from the Boston University School of Public Health, a recognized institution for research and education. This article also directly references a study published in the Human Reproduction academic journal, a peer reviewed scientific source published by Oxford University Press.
I cross-checked this information with a 2020 study by The BMJ, a peer reviewed medical journal published by the British Medical Association. This study surveyed more than 17,000 women trying to conceive by investigating their contraceptive histories. The conclusion of this research found that there are varying delays in reproductivity after stopping the use of contraceptives based on which method, such as the pill, intrauterine devices, depo-provera shot and the implant. The IUD had the shortest delay in returning to full fertility, and the injectable contraceptives took the longest. However, despite the variation in delays, they concluded that none of these long-term methods "appear[ed] to be detrimental to fertility" and the study "indicate[d] little or no lasting effect of long term use of these methods on fecundability."
https://doi.org/10.1136/bmj.m3966