2 months old baby -long stretch nights.

Hi Doc, My baby is 2 months old and I breast feed her. From the end of first month i started to put her to night sleep by 9.30 PM. She wokeup at regular intervals like 2hr or 3hr once to get her feed at night. After the end of 2nd month she sleeps well at night and wakes after 5 or 6 hrs interval and rarely she wakes at 2hrs or 3hrs interval for the night feed. Also she wakes in the morning without any fussiness. Even if i wake her up in 2,3 or 4hrs interval in the night and feed her she doesn't drink much and goes to sleep immediately.. In the morning I breast feed her at regular intervals is that the reason she has long stretches. Is it ok for 2 months baby to have long stretches at night with 5 or 6hrs waking interval.Please let me know.Thanks in advance for your response.