Did I Conceive May 11th or May 12th?

Question

I was reading thru questions asking about “Who is the father?” One of the questions asked seemed very similiar to the situation that I’m going thru. I was hoping you could help me calculate using the one suggestion given to a woman that is in the same situation I am in. I have the dates of conception, one is on May 11 and the other is the next day May 12. My due date is between March 2, 2009-March 6, 2009. One is from a sonogram and the other from the last day of my period, which to be honest, I’m not quite sure about the exact days of my last period.
The suggestion given to this woman was to give the date of conception, subtract three months, and subtract seven days from the due date. Like I had mentioned, on the sonogram that I had done on September 23, 2008 I was 16 weeeks and 4 days pregnant. Will you help me determine which man is the father of my future baby, please.

Thank You,

Dora

Answer

It is not possible to determine which date you conceived by ultrasound measurements or mathematical calculations, as they are just a day apart. You could have conceived either day, based on the ultrasound, and due date you are given.

I do not know your situation, but may I suggest you focus and plan for your future, and your child’s, regardless of who ends up being identified as the biological father? And if you are planning a future with one of them, it is much more important who would be the better father, than whose sperm resulted in this conception.

I wish you the best….

Sheila St. John

Answered By:

Sheila St. John
Sheila St. John is the Executive Director of the California Association of Natural Family Planning, coordinating the non-profit’s education and advocacy efforts throughout the state. Initially attracted to NFP as a healthy, effective method for planning families, drug, device and surgery free, her passion for NFP has grown over the last 42 years as she has journeyed with the over 900 couples she has personally instructed in its use, and been privileged to witness its role in overcoming infertility, women’s health, and the transformation that occurs in lives of men, women, and families, when we embrace God’s design for love and life.

Read more related questions

Is Progesterone Supplementation Moral?

I am currently 28 weeks pregnant with my second child. My first was born premature. My ob suggested progesterone injections starting at 16 weeks through…

Stressed I Might Be Pregnant

I am really stressed. I just got out of a four year relationship and I am worried I might become pregnant. No symptoms but it…

Are Fibroids Causing Bleeding During Pregnancy?

Hello, I am 45 years old and have large fibroids. I was about to have surgery to remove the womb. I am now seven weeks…

Scared I Am Miscarrying

I am writing because I am 13 weeks pregnant by ultrasound and LMP (but 11 weeks by my chart). This is my 4th pregnancy, I…

Scared Progesterone Can Harm My Baby

I am 32 years old and this is my first pregnancy. I have never had a miscarriage but when I started bleeding (hematoma) at 12…

Should I Stop Nursing Since Pregnant

I am four weeks pregnant with my third pregnancy and still nursing my nine month old pretty frequently. I am 30. I nursed during my…

Progesterone in Pregnancy—History of Miscarriage and Pre-Term Delivery

We are seven weeks pregnant after trying for over a year. We miscarried last year after being on Prometrium for low progesterone and infertilty (infertile…

Desperate for Explanation of Brown Spotting

I had sexual intercourse with my boyfriend and I am currently age 22. I finished my period on March 10th and the last time I…

Is My Progesterone Too Low for 15 Weeks Pregnant?

I am 42 years old and 16 weeks pregnant. I have had four first trimester losses (before nine weeks). I am MTHFR compound hetero (C677…

Estimating Date of Conception

How can my fertility doctor be sure I conceived on May 14? My period started on April 30. My six week five day ultrasound showed…

Could I Be Pregnant Without Intercourse?

I am 18, and my period has not yet become regular, but it has been over two months since my last period, which was June…

Did I Conceive May 11th or May 12th?

I was reading thru questions asking about “Who is the father?” One of the questions asked seemed very similiar to the situation that I’m going…

Create An Account

This is not a membership, this is an account for our CANFP website. If you decide you would like to sign up for one of our memberships later, you can do so with or without this account.

First Name *
Last Name *
E-mail *
Username *
Password *
Confirm Password *
Edit Profile
Information
Subscriptions
Payments
Order History
Downloads
Shipping and Billing
Donations
Settings
Login Information
Notification Settings
Notification Subscriptions
Profile

CANFP conducts varied outreach programs to the community at large, in addition to serving our members (NFP users, teachers, and advocates).

CANFP provides education programs tailored to the audience, not only on Natural Family Planning, but on the wide variety of topics related to it.

Programs can be continuing education for NFP Professionals, introductory information for a lay audience of youth or adults new to the topic, or specifically tailored to the interests of a professional audience, such as educators, physicians, or clergy. Content is faith based or secular, whichever is suitable for situation.

CANFP offers a variety of resources for those just discovering Natural Family Planning, as well as to meet the varied needs of our CANFP Members. Most resources are available to any visitors to our site. Some resources do ask you to register as a site user in order to access them, others are available only to CANFP Members.

CANFP statewide conferences, regional events offered in collaboration with local partners, events featuring CANFP speakers, or exhbit, as well as other events throughout the state of interest to our NFP community.  Come meet one of our experts at one of these events or book a speaker for your own upcoming event.

CANFP depends on the gifts, talents, and generosity of our members and supporters. The success of our mission depends on the collaboration of our members. Please consider contributing your time treasure and talent through CANFP to share the good news of NFP with the world! Both volunteer and contracted positions available.

Stay informed by joining our email list

* indicates required
Which role(s) best describes you?