We continue to develop resources related to the COVID-19 pandemic. See COVID-19 initiatives on Appropedia for more information.

Daily menstrual cycle tracker

From Appropedia
Jump to navigation Jump to search
MOST Delta filament as guide.JPG This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing

Please leave comments using the discussion tab. The course runs in the Fall semester. It is not open edit.

Daily Menstrual Cycle Tracker[edit]

Project developed by [jjwyrzyk]
This OSAT has been designed but not yet tested - use at own risk.
This OSAT has been prototyped.

You can help Appropedia by contributing to the next step in this OSAT's status.


  1. This project is a desktop menstrual cycle tracker, that one simply uses by moving the pointer as each day passes. In many countries and cultures, contraceptives are expensive and frowned upon, even with married couples. Couples in poverty struggle with having too many children, nevertheless. A method for preventing pregnancy without use of conventional contraceptives is by having sex at the correct time in a menstrual cycle to minimize the chance of a birth. This device cheaply allows women to track their cycle easily, and can also be used when a couple is having trouble having kids. Women having a good awareness of their cycles is also crucial to maintaining their health.

Find more information on a similar idea here: [1]

Bill of Materials[edit]

  1. BOM: Bottom(1), Base (1), Pointer(1), Small Attracting Magnets(optional) (2)
    1. See source information on Thingiverse: [2]

Tools needed for fabrication of the OSAT[edit]

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. Super Glue
  3. 3 Different Color Paints (Preferably Green, Red and Brown)

Skills and Knowledge Necessary to Make the OSAT[edit]

  • No special skills required!

Technical Specifications and Assembly Instructions[edit]

  1. Print time: ~3 Hours
  2. Assembly time ~15 mins
  3. Center the Bottom underneath the Base, and super glue into place.
Bottom on Base.jpg
  1. Flip assembly over, then glue or use existing adhesive to attach magnet half into the center of Bottom, such that it is in the center hole.
Magnet on base.jpg
  1. Glue or use existing adhesive to attach magnet half into the bottom of the Pointer.
Magnet in pointer.jpg
  1. Paint the top of Base as shown in the picture. On this model:
Painted bottom base.jpg
    1. Green means that the chance of getting pregnant is high.
    2. Brown means that there is a low chance of getting pregnant.
    3. The yellow line is the marker for 26 days, and can be used as a reference for is the user's period has occurred early.
    4. The red line signifies the start of the user's period.
  1. Place the pointer in the hole as shown, and advance a notch clockwise as each day goes by!
Completed cycle tracker.jpg

Common Problems and Solutions[edit]

  • Make sure you advance the tracker clockwise!
  • Sand the parts as necessary to make the movement smoother.

Cost savings[edit]

  1. Total filament usage: 35g = ~$0.70
  2. Magnets: $1.00 at Hardware Store

Commercial equivalent: $29 [3] $28.30 savings and 97.5% savings

Benefited Internet Communities[edit]

  1. Thingiverse.com [4]
  2. Planned Parenthood [5]
  3. U.S. Department of Health and Human Services [6]
  4. Office on Women's Health [7]
  5. WebMD [8]