Washington, May 9 : American racing cyclist Lance Armstrong has revealed in his forthcoming book that he and former fiancé Sheryl Crow called it quits because Crow was keen to have a baby while Lance was not.

Lance divulges in his book that, as he had just got out of his marriage, he did not have any immediate plans to have a baby with former fiancé Sheryl Crow, as her biological clock was ticking.

"She wanted marriage, she wanted children; and not that I didn''t want that, but I didn''t want that at that time because I had just gotten out of a marriage, I''d just had kids [Luke, 9, and twins Grace and Bella, 7]," Us weekly quoted Lance as stating in his book.

"Yet we''re up against her biological clock -- that pressure is what cracked it," Lance added.

Lance revealed that the former duo even visited a counsellor but to no avail, as Crow was bent upon having a baby.

"If somebody wants a child -- man, that''s the greatest gift you can give to a woman -- ... who are you to stand there and say I don''t want one?" he says. "So we were at different points in our lives. We were not compatible on that issue," Lance writes.

"I felt like I wasn''t ready ... I would have been in the future, but not then," Lance added.

After the split, Crow went on to adopt a two-week-old boy, Wyatt, and declared that she was loving each moment of her motherhood.

Lance announced in December that he was expecting a baby with girlfriend Anna Hansen. (ANI)