Crocodile pose is good

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Makarasana (Crocodile Pose)

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Matsya Kridasana (Playing Fish Pose)

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For better health of reproductive organs, try this

To begin, lie down on your abdomen with your legs straight and keep them apart with your toes pointing out to the sides. Hold onto your biceps in front of you and drop your forehead onto your arm with your eyes closed.

Allow yourself to be comfortable and relaxed and bring your awareness to your breathing in the naval center. As you inhale, feel your breath reaching the lower abdomen and as you exhale, relax into the floor. Stay in the crocodile position for about 5 to 10 minutes.
Next, bend your right knee and turn your head gently to the right while you place your left ear onto your left arm. Keep your right arm bent at the side. Again, relax your entire body and stay in the playing fish pose for about two to three minutes. Then change sides and stay for as long as you like.

Benefits: These poses improve blood circulation to the uterus, normalises menstrual cycle, relieves cramps and pain in women. For men, it helps improves blood circulation to the testes, stimulates the prostrate gland and keeps the reproductive organs healthy. It is an excellent pose for high stress and lower back pain. It helps strengthen the diaphragm and increases lung capacity.