Dr Patretia embarked on her career after successfully completing her studies: MBBS (1987) and DGO (1990) from Trivandrum Medical College, Kerala, India, followed by MD (1994) at Madras Medical College, Chennai, India. She also obtained DNB (1995) from the National Board Examination, New Delhi, India. Additionally, she completed her MRCOG (2002) from the Royal College of Obstetricians and Gynaecologists in London, UK, and became a Fellow, FRCOG (2014). She further pursued Fellowship and Diploma in Minimal Access Surgery from World Laparoscopy Hospital, India.
She underwent medical training at Trivandrum Medical College in Kerala and Chennai Medical College, Tamil Nadu, India. Following this, she completed specializations in colposcopy, laparoscopy, hysteroscopy, ultrasonography, and lactation.