Major Contributors for Irregular Bowel Movements
An Ayurvedic Approach for Promoting Regular Bowel Movements Naturally:

Senna leaf
Senna contains natural laxative called anthraquinones (an active chemical component), which improves contraction of intestinal muscles and helps in improving bowel movement.

Aloe vera
Aloe vera have high anthraquinones, which improves intestinal muscle contraction and helps in the treatment of constipation.

Myrobalan (Haritaki)
Myrobalan seeds in any form aids in healthy digestion and easier bowel movement.

Cascara Sagrada Bark
Cascara sagrada bark contains active constituents called cascarosides A and B, which are responsible for the laxative effect.

Fennel seed
The essential oils present in fennel seeds helps in treating common digestive issues like gas, cramping etc.