The Mosie syringe is one of the most popular tools for home insemination, designed specifically with the anatomy of the vaginal canal in mind. Its curved tip and closed-end design minimize discomfort and help direct the sample toward the cervical os. Whether this is your first insemination or you are switching from a standard syringe, this walkthrough covers every detail of correct Mosie use — from opening the package to lying in rest position.
Preparing the Mosie Syringe Before Use
The Mosie syringe comes individually packaged in a sterile wrapper. Do not open the wrapper until you are ready to use it, and do not touch the syringe tip or interior plunger after opening. Wash your hands with soap and water for a minimum of 20 seconds before handling. Lay the syringe on a clean surface (a sterile pad or unopened paper towel works well) alongside your collection cup and sample.
Unlike a standard catheter-tip syringe, the Mosie has a curved tip with side openings rather than a straight end opening. This design disperses the sample more gently and reduces the chance of it being expelled too forcefully in one direction. Familiarize yourself with how the plunger feels by doing a dry practice draw before your insemination day — simply use water the first time so you are comfortable with the mechanism under no pressure.
Loading the Sample Into the Mosie Syringe
After your sample is thawed or freshly collected, use the Mosie syringe to draw it directly from the collection cup. Insert the tip into the sample, hold the cup at a slight angle to pool the liquid, and slowly pull back the plunger until the barrel is filled. The Mosie holds approximately 1mL, which accommodates most standard ICI-prepared vials. Pull back more slowly than feels necessary — a fast draw creates bubbles that reduce effective volume.
Tap the syringe gently and hold it vertically with the tip facing down to allow any small bubbles to rise to the top of the barrel. You can push out a tiny amount of fluid (less than 0.05mL) to clear any air at the tip. Do not push out enough to waste meaningful sample volume. Once the syringe is loaded and bubble-free, proceed to insemination within 10–15 minutes.
Inserting and Depositing the Sample
Position yourself on your back with your hips elevated on a pillow or folded blanket. Separate your labia gently and insert the Mosie tip into the vaginal opening, angling slightly posteriorly (toward your lower back) rather than straight up. Insert until the barrel is about halfway inside the vaginal canal — approximately 1–2 inches. You are not attempting to reach or enter the cervix with the Mosie; the goal is to deposit the sample close to the cervical opening.
Depress the plunger slowly and steadily over 5–8 seconds. A slow, gentle release gives the sperm time to disperse naturally and prevents the sample from being expelled back out. Hold the syringe in place for 15–20 seconds after the plunger is fully depressed before gently withdrawing it. Removing the syringe too quickly creates a slight suction that can pull the sample back out. Stay in your rest position for at least 15–20 minutes after removal.
Cleaning Up and Storing or Disposing of the Syringe
Mosie syringes are designed for single use, and the company recommends using a fresh syringe for each insemination. If doing a second insemination later in the same cycle, use the second syringe from a new package. Do not attempt to sterilize and reuse a Mosie syringe with bleach, boiling, or autoclave methods at home — the plastic may degrade, leach chemicals, or fail to achieve sterility adequate for vaginal use.
Dispose of used syringes in a sealed plastic bag placed in your regular waste bin. You do not need a sharps container for a needleless syringe. If you have remaining unopened Mosie syringes from a kit, store them in their original sealed packaging at room temperature, away from heat, moisture, and direct sunlight. Check the expiration date printed on each packet before using a stored syringe.
Further reading across our network: MakeAmom.com · Mosie.baby · MoiseBaby.com · IntracervicalInsemination.org
This article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making decisions about your fertility care.