The Boston Cross Check Method has its roots in the Sympto Thermal Method. In 1974, the Sympto Thermal Method began to be taught in the Archdiocese of Boston at both St. Margaret’s Hospital for Women and St. Elizabeth Hospital. Both programs offered hospital and parish-based instruction in the Sympto Thermal Method. In addition, both hospital programs offered periodic teacher training programs. All client education and teacher training programs followed standards developed by the Human Life Foundation and the New England Natural Family Planning Association. This Association, begun in the late 1970’s, served as a professional organization for all providers of NFP in New England and Albany, New York. In addition to developing standards based on the work of Human Life International, it sponsored biannual meetings for professional development and support. The Association disbanded in 1999.

In 1993, upon the closure of St. Margaret’s Hospital for women, its Sympto Thermal Method Program became a ministry of the Archdiocesan Family Life Office and the method was named the Archdiocese of Boston Double Check Method. Programming at St. Elizabeth Hospital ceased and client education programs became solely parish based.

In 2005, instruction in the use of the Clearblue Easy Fertility Monitor for women in “regular cycles” was first included in the client education program. Monitor use was optional and the name of the method was changed to the Archdiocese of Boston Cross Check Method to reflect the possible incorporation of a third fertility indicator.

In 2009, training in the use of the Clearblue Easy Fertility Monitor was provided to all teachers of the Archdiocese of Boston Cross Check Method, and other interested NFP providers, by a faculty member from the Institute of Natural Family Planning of Marquette University. This training allowed for further integration of the Clearblue Easy Fertility Monitor into the Archdiocese of Boston Cross Check Method.

In 2011, remote ("virtual") instruction was first provided by BCC instructor, Mikayla Dalton, through a video conferencing app. 

In 2013, use of the Clearblue Fertility Monitor for breastfeeding women was incorporated into the Archdiocese of Boston Cross Check Method.

In 2017, upon the retirement of Mary Finnigan, the Archdiocesan NFP Coordinator, all instruction in the Archdiocese of Boston Cross Check Method became remote instruction.

Periodic teacher training programs in the method were conducted from 1993 - 2017.  Four were run in Brighton (1993-2009) and two in Braintree (2009-2017).

In 2019, the rights to the Archdiocese of Boston Cross Check Method (both client education program and teacher training program) were sold to Mary Finnigan, and the method was rebranded as the Boston Cross Check Method, (BCC). Updating of BCC methodology, creation of new client materials and development of a new teacher training program were undertaken.

In 2021, the first BCC teacher training program was offered virtually with 12 participants, including one from England and one from Ireland.
In spring 2022, BCC became an LLC and the rights to the method (both client education program and teacher training program) were sold to the LLC. The method will continue in the hands of lay families who live the challenges and joys that come with NFP. 

BCC runs an instructor training cohort every year or every other year, each with 5-12 participants, and we are proud of our bright and passionate new instructors. Our training and supervision is intensive and in-person. We take the same serious approach to preparing our instructors as we do to providing quality, personalized "live" instruction to women and couples, prioritizing individual instruction before group classes, with a focus on quality over quantity.