Kay I pray that your U/S will come out ok.
If your husband wants to tell his family then I guess you cannot stop him. He is excited. The first time I told very early because it was my first time. This next time I will not tell until I pass my first trimester. Except for you guys.
I think you should do what is in your heart. I think your biggest problem is with the SIL. But then again, she is always going to be a problem for you. If it is not this, it will be some other subject. Until she goes through more life she will be clueless to others. Just tell her once the baby gets here.

But everyone else, do what feels right to you.
Hello Trusting- The seminar was super. I got there at 6pm and did not leave until 10pm. His lecture turned out to be more than 2 hours and he stayed and answered everyone's questions after, hence 10pm.
What I learned highlights.
Most couples who go to him have usually been through the fertility mill. Many have been told that there is no hope, that they just cannot have children. So most of his cases are pretty tough cases. He is the only doctor. He works 7 days a week 365 days a year. (he no longer does surgery or delivers babies, his only focus is this) He has a support staff of 40.
BMI - Body mass index can affect IVF pregnancy rates. Overweight women are at greater risk of miscarriage. I need to lose like 7 lbs....
Thrombophilias and Pregnancy - a disorder that causes blood clotting.
Recurrent Pregnancy Loss - Most common problem is the embryo 95% of the chromosomally abnormal embryos are abnormal as a result of a problem with the egg. A second problem is problems with the uterine structure, hormonal or immunological issues. Immune treatments: IVIG (expensive) Intralipid (IL) another option that uses egg yolk and soybean.
Preimplantation Genetic Testing - eggs are tested for certain genetic conditions prior to be placed in the womb. They remove a single cell from a 3 day old embryo and test it for chromosomal disorders. You can select a egg that is less likely to have chromosomal abnormalities. The risk is about 1/1000 for damaging the embryo.
Egg Vitrification - new flash freeze of eggs. the previous slow freeze method only 6% of eggs frozen would survive the freezing and thawing process. Today Vitrification over 90% of eggs survives. This is the method they have moved to 2 years ago.
How to prepare - BMI. stress reduction, acupuncture, nutritional supplements, no smoking, treat immune responses
State of the Art Lab - He uses his own lab and has a embryologist on staff. The lab has a state of the art air system. no toxic or volatile chemicals in the lab and the control the temp and pressure and air quality. The staff always works in pairs to combat mistakes being made. Each couple has their own incubator so you are changing the environment of another couples eggs by opening and closing the door. His lead guy is very anal about the lab and the temp and the eggs.
Male infertility - they can can now just go through the scrotum and retrieve the sperm if the counts are low and just place one sperm in one egg. All the men fainted. (just kidding) but even the doctor mentioned all the men looked pale after showing how to retrieve the sperm. lol.
There was over 2 hours of information disseminated so I will just stop here.