1968- General Handbook of Instructions, pp 44- "Prayers in Church Meetings Prayers in all Church meetings should be brief, simple, and given as led by the spirit by the one who is voice. Their content should pertain to the particular matter at hand. Brethren holding the Melchizedek or Aaronic Priesthood should offer the prayers in sacrament meetings, including fast and testimony meetings. Those praying should use the pronoun forms of Thy, Thee, Thine, Thou in addressing the Lord."
1975- June- Ensign, "News of the Church”- "Prayers in Sacrament and Priesthood Meetings: Attention is called to the following instruction which appeared in the July-August 1967 Priesthood Bulletin. The First Presidency recommends that only those who bear the Melchizedek Priesthood or Aaronic Priesthood be invited to offer the opening and closing prayers in sacrament meetings, including fast meetings. This also applies to priesthood meetings."
1978- November- Ensign, "News of the Church"- At a Regional Representatives seminar on September 29 President Kimball said- “The First Presidency and Council of the Twelve have determined that there is no scriptural prohibition against sisters offering prayers in sacrament meetings. It was therefore decided that it is permissible for sisters to offer prayers in any meetings they attend, including sacrament meetings, Sunday School meetings, and stake conferences. Relief Society visiting teachers may offer prayers in homes that they enter in fulfilling visiting teaching assignments.”
2010- The new Church Handbook of Instructions repudiates the unofficial practice of having only men give closing prayers in Sacrament meeting- "Men and women may offer both opening and closing prayers in Church meetings." -
2010- November, Ensign, "Because of Your Faith", Elder Jeffrey R. Holland- “Not one of us could serve without your prayers and without your support.”-
2011- May, Ensign, "LDS Women Are Incredible!", Elder Quentin L. Cook- “From our earliest history both men and women pray, perform the music, give the sermons, and sing in the choir, even in sacrament meeting, our most sacred meeting."
2013- Letters are sent to General Authorities, asking that women be invited to pray in General Conference.